Date: March 20, 2011 This library is created from "LPC17xx CMSIS-Compliant Standard Peripheral Firmware Driver Library (GNU, Keil, IAR) (Jan 28, 2011)", available from NXP's website, under "All microcontrollers support documents" [[http://ics.nxp.com/support/documents/microcontrollers/?type=software]] You will need to follow [[/projects/libraries/svn/mbed/trunk/LPC1768/LPC17xx.h]] while using this library Examples provided here [[/users/frank26080115/programs/LPC1700CMSIS_Examples/]] The beautiful thing is that NXP does not place copyright protection on any of the files in here Only a few modifications are made to make it compile with the mbed online compiler, I fixed some warnings as well. This is untested as of March 20, 2011 Forum post about this library: [[/forum/mbed/topic/2030/]]
lpc17xx_wdt.c@0:84d7747641aa, 2011-03-20 (annotated)
- Committer:
- frank26080115
- Date:
- Sun Mar 20 18:45:15 2011 +0000
- Revision:
- 0:84d7747641aa
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
frank26080115 | 0:84d7747641aa | 1 | /***********************************************************************//** |
frank26080115 | 0:84d7747641aa | 2 | * @file lpc17xx_wdt.c |
frank26080115 | 0:84d7747641aa | 3 | * @brief Contains all functions support for WDT firmware library on LPC17xx |
frank26080115 | 0:84d7747641aa | 4 | * @version 2.0 |
frank26080115 | 0:84d7747641aa | 5 | * @date 21. May. 2010 |
frank26080115 | 0:84d7747641aa | 6 | * @author NXP MCU SW Application Team |
frank26080115 | 0:84d7747641aa | 7 | ************************************************************************** |
frank26080115 | 0:84d7747641aa | 8 | * Software that is described herein is for illustrative purposes only |
frank26080115 | 0:84d7747641aa | 9 | * which provides customers with programming information regarding the |
frank26080115 | 0:84d7747641aa | 10 | * products. This software is supplied "AS IS" without any warranties. |
frank26080115 | 0:84d7747641aa | 11 | * NXP Semiconductors assumes no responsibility or liability for the |
frank26080115 | 0:84d7747641aa | 12 | * use of the software, conveys no license or title under any patent, |
frank26080115 | 0:84d7747641aa | 13 | * copyright, or mask work right to the product. NXP Semiconductors |
frank26080115 | 0:84d7747641aa | 14 | * reserves the right to make changes in the software without |
frank26080115 | 0:84d7747641aa | 15 | * notification. NXP Semiconductors also make no representation or |
frank26080115 | 0:84d7747641aa | 16 | * warranty that such application will be suitable for the specified |
frank26080115 | 0:84d7747641aa | 17 | * use without further testing or modification. |
frank26080115 | 0:84d7747641aa | 18 | **********************************************************************/ |
frank26080115 | 0:84d7747641aa | 19 | |
frank26080115 | 0:84d7747641aa | 20 | /* Peripheral group ----------------------------------------------------------- */ |
frank26080115 | 0:84d7747641aa | 21 | /** @addtogroup WDT |
frank26080115 | 0:84d7747641aa | 22 | * @{ |
frank26080115 | 0:84d7747641aa | 23 | */ |
frank26080115 | 0:84d7747641aa | 24 | |
frank26080115 | 0:84d7747641aa | 25 | /* Includes ------------------------------------------------------------------- */ |
frank26080115 | 0:84d7747641aa | 26 | #include "lpc17xx_wdt.h" |
frank26080115 | 0:84d7747641aa | 27 | #include "lpc17xx_clkpwr.h" |
frank26080115 | 0:84d7747641aa | 28 | #include "lpc17xx_pinsel.h" |
frank26080115 | 0:84d7747641aa | 29 | |
frank26080115 | 0:84d7747641aa | 30 | |
frank26080115 | 0:84d7747641aa | 31 | /* If this source file built with example, the LPC17xx FW library configuration |
frank26080115 | 0:84d7747641aa | 32 | * file in each example directory ("lpc17xx_libcfg.h") must be included, |
frank26080115 | 0:84d7747641aa | 33 | * otherwise the default FW library configuration file must be included instead |
frank26080115 | 0:84d7747641aa | 34 | */ |
frank26080115 | 0:84d7747641aa | 35 | #ifdef __BUILD_WITH_EXAMPLE__ |
frank26080115 | 0:84d7747641aa | 36 | #include "lpc17xx_libcfg.h" |
frank26080115 | 0:84d7747641aa | 37 | #else |
frank26080115 | 0:84d7747641aa | 38 | #include "lpc17xx_libcfg_default.h" |
frank26080115 | 0:84d7747641aa | 39 | #endif /* __BUILD_WITH_EXAMPLE__ */ |
frank26080115 | 0:84d7747641aa | 40 | |
frank26080115 | 0:84d7747641aa | 41 | |
frank26080115 | 0:84d7747641aa | 42 | #ifdef _WDT |
frank26080115 | 0:84d7747641aa | 43 | |
frank26080115 | 0:84d7747641aa | 44 | /* Private Functions ---------------------------------------------------------- */ |
frank26080115 | 0:84d7747641aa | 45 | |
frank26080115 | 0:84d7747641aa | 46 | static uint8_t WDT_SetTimeOut (uint8_t clk_source, uint32_t timeout); |
frank26080115 | 0:84d7747641aa | 47 | |
frank26080115 | 0:84d7747641aa | 48 | /********************************************************************//** |
frank26080115 | 0:84d7747641aa | 49 | * @brief Set WDT time out value and WDT mode |
frank26080115 | 0:84d7747641aa | 50 | * @param[in] clk_source select Clock source for WDT device |
frank26080115 | 0:84d7747641aa | 51 | * @param[in] timeout value of time-out for WDT (us) |
frank26080115 | 0:84d7747641aa | 52 | * @return None |
frank26080115 | 0:84d7747641aa | 53 | *********************************************************************/ |
frank26080115 | 0:84d7747641aa | 54 | static uint8_t WDT_SetTimeOut (uint8_t clk_source, uint32_t timeout) |
frank26080115 | 0:84d7747641aa | 55 | { |
frank26080115 | 0:84d7747641aa | 56 | |
frank26080115 | 0:84d7747641aa | 57 | uint32_t pclk_wdt = 0; |
frank26080115 | 0:84d7747641aa | 58 | uint32_t tempval = 0; |
frank26080115 | 0:84d7747641aa | 59 | |
frank26080115 | 0:84d7747641aa | 60 | switch ((WDT_CLK_OPT) clk_source) |
frank26080115 | 0:84d7747641aa | 61 | { |
frank26080115 | 0:84d7747641aa | 62 | case WDT_CLKSRC_IRC: |
frank26080115 | 0:84d7747641aa | 63 | pclk_wdt = 4000000; |
frank26080115 | 0:84d7747641aa | 64 | // Calculate TC in WDT |
frank26080115 | 0:84d7747641aa | 65 | tempval = (((pclk_wdt) / WDT_US_INDEX) * (timeout / 4)); |
frank26080115 | 0:84d7747641aa | 66 | // Check if it valid |
frank26080115 | 0:84d7747641aa | 67 | if ((tempval >= WDT_TIMEOUT_MIN) && (tempval <= WDT_TIMEOUT_MAX)) |
frank26080115 | 0:84d7747641aa | 68 | { |
frank26080115 | 0:84d7747641aa | 69 | LPC_WDT->WDTC = tempval; |
frank26080115 | 0:84d7747641aa | 70 | return SUCCESS; |
frank26080115 | 0:84d7747641aa | 71 | } |
frank26080115 | 0:84d7747641aa | 72 | |
frank26080115 | 0:84d7747641aa | 73 | break; |
frank26080115 | 0:84d7747641aa | 74 | |
frank26080115 | 0:84d7747641aa | 75 | case WDT_CLKSRC_PCLK: |
frank26080115 | 0:84d7747641aa | 76 | |
frank26080115 | 0:84d7747641aa | 77 | // Get WDT clock with CCLK divider = 4 |
frank26080115 | 0:84d7747641aa | 78 | pclk_wdt = SystemCoreClock / 4; |
frank26080115 | 0:84d7747641aa | 79 | // Calculate TC in WDT |
frank26080115 | 0:84d7747641aa | 80 | tempval = (((pclk_wdt) / WDT_US_INDEX) * (timeout / 4)); |
frank26080115 | 0:84d7747641aa | 81 | |
frank26080115 | 0:84d7747641aa | 82 | if ((tempval >= WDT_TIMEOUT_MIN) && (tempval <= WDT_TIMEOUT_MAX)) |
frank26080115 | 0:84d7747641aa | 83 | { |
frank26080115 | 0:84d7747641aa | 84 | CLKPWR_SetPCLKDiv (CLKPWR_PCLKSEL_WDT, CLKPWR_PCLKSEL_CCLK_DIV_4); |
frank26080115 | 0:84d7747641aa | 85 | LPC_WDT->WDTC = (uint32_t) tempval; |
frank26080115 | 0:84d7747641aa | 86 | return SUCCESS; |
frank26080115 | 0:84d7747641aa | 87 | } |
frank26080115 | 0:84d7747641aa | 88 | |
frank26080115 | 0:84d7747641aa | 89 | // Get WDT clock with CCLK divider = 2 |
frank26080115 | 0:84d7747641aa | 90 | pclk_wdt = SystemCoreClock / 2; |
frank26080115 | 0:84d7747641aa | 91 | // Calculate TC in WDT |
frank26080115 | 0:84d7747641aa | 92 | tempval = (((pclk_wdt) / WDT_US_INDEX) * (timeout / 4)); |
frank26080115 | 0:84d7747641aa | 93 | |
frank26080115 | 0:84d7747641aa | 94 | if ((tempval >= WDT_TIMEOUT_MIN) && (tempval <= WDT_TIMEOUT_MAX)) |
frank26080115 | 0:84d7747641aa | 95 | { |
frank26080115 | 0:84d7747641aa | 96 | CLKPWR_SetPCLKDiv (CLKPWR_PCLKSEL_WDT, CLKPWR_PCLKSEL_CCLK_DIV_2); |
frank26080115 | 0:84d7747641aa | 97 | LPC_WDT->WDTC = (uint32_t) tempval; |
frank26080115 | 0:84d7747641aa | 98 | return SUCCESS; |
frank26080115 | 0:84d7747641aa | 99 | } |
frank26080115 | 0:84d7747641aa | 100 | |
frank26080115 | 0:84d7747641aa | 101 | // Get WDT clock with CCLK divider = 1 |
frank26080115 | 0:84d7747641aa | 102 | pclk_wdt = SystemCoreClock; |
frank26080115 | 0:84d7747641aa | 103 | // Calculate TC in WDT |
frank26080115 | 0:84d7747641aa | 104 | tempval = (((pclk_wdt) / WDT_US_INDEX) * (timeout / 4)); |
frank26080115 | 0:84d7747641aa | 105 | |
frank26080115 | 0:84d7747641aa | 106 | if ((tempval >= WDT_TIMEOUT_MIN) && (tempval <= WDT_TIMEOUT_MAX)) |
frank26080115 | 0:84d7747641aa | 107 | { |
frank26080115 | 0:84d7747641aa | 108 | CLKPWR_SetPCLKDiv (CLKPWR_PCLKSEL_WDT, CLKPWR_PCLKSEL_CCLK_DIV_1); |
frank26080115 | 0:84d7747641aa | 109 | LPC_WDT->WDTC = (uint32_t) tempval; |
frank26080115 | 0:84d7747641aa | 110 | return SUCCESS; |
frank26080115 | 0:84d7747641aa | 111 | } |
frank26080115 | 0:84d7747641aa | 112 | break ; |
frank26080115 | 0:84d7747641aa | 113 | |
frank26080115 | 0:84d7747641aa | 114 | |
frank26080115 | 0:84d7747641aa | 115 | case WDT_CLKSRC_RTC: |
frank26080115 | 0:84d7747641aa | 116 | pclk_wdt = 32768; |
frank26080115 | 0:84d7747641aa | 117 | // Calculate TC in WDT |
frank26080115 | 0:84d7747641aa | 118 | tempval = (((pclk_wdt) / WDT_US_INDEX) * (timeout / 4)); |
frank26080115 | 0:84d7747641aa | 119 | // Check if it valid |
frank26080115 | 0:84d7747641aa | 120 | if ((tempval >= WDT_TIMEOUT_MIN) && (tempval <= WDT_TIMEOUT_MAX)) |
frank26080115 | 0:84d7747641aa | 121 | { |
frank26080115 | 0:84d7747641aa | 122 | LPC_WDT->WDTC = (uint32_t) tempval; |
frank26080115 | 0:84d7747641aa | 123 | return SUCCESS; |
frank26080115 | 0:84d7747641aa | 124 | } |
frank26080115 | 0:84d7747641aa | 125 | |
frank26080115 | 0:84d7747641aa | 126 | break; |
frank26080115 | 0:84d7747641aa | 127 | |
frank26080115 | 0:84d7747641aa | 128 | // Error parameter |
frank26080115 | 0:84d7747641aa | 129 | default: |
frank26080115 | 0:84d7747641aa | 130 | break; |
frank26080115 | 0:84d7747641aa | 131 | } |
frank26080115 | 0:84d7747641aa | 132 | |
frank26080115 | 0:84d7747641aa | 133 | return ERROR; |
frank26080115 | 0:84d7747641aa | 134 | } |
frank26080115 | 0:84d7747641aa | 135 | |
frank26080115 | 0:84d7747641aa | 136 | /* End of Private Functions --------------------------------------------------- */ |
frank26080115 | 0:84d7747641aa | 137 | |
frank26080115 | 0:84d7747641aa | 138 | |
frank26080115 | 0:84d7747641aa | 139 | /* Public Functions ----------------------------------------------------------- */ |
frank26080115 | 0:84d7747641aa | 140 | /** @addtogroup WDT_Public_Functions |
frank26080115 | 0:84d7747641aa | 141 | * @{ |
frank26080115 | 0:84d7747641aa | 142 | */ |
frank26080115 | 0:84d7747641aa | 143 | |
frank26080115 | 0:84d7747641aa | 144 | |
frank26080115 | 0:84d7747641aa | 145 | /*********************************************************************//** |
frank26080115 | 0:84d7747641aa | 146 | * @brief Initial for Watchdog function |
frank26080115 | 0:84d7747641aa | 147 | * Clock source = RTC , |
frank26080115 | 0:84d7747641aa | 148 | * @param[in] ClkSrc Select clock source, should be: |
frank26080115 | 0:84d7747641aa | 149 | * - WDT_CLKSRC_IRC: Clock source from Internal RC oscillator |
frank26080115 | 0:84d7747641aa | 150 | * - WDT_CLKSRC_PCLK: Selects the APB peripheral clock (PCLK) |
frank26080115 | 0:84d7747641aa | 151 | * - WDT_CLKSRC_RTC: Selects the RTC oscillator |
frank26080115 | 0:84d7747641aa | 152 | * @param[in] WDTMode WDT mode, should be: |
frank26080115 | 0:84d7747641aa | 153 | * - WDT_MODE_INT_ONLY: Use WDT to generate interrupt only |
frank26080115 | 0:84d7747641aa | 154 | * - WDT_MODE_RESET: Use WDT to generate interrupt and reset MCU |
frank26080115 | 0:84d7747641aa | 155 | * @return None |
frank26080115 | 0:84d7747641aa | 156 | **********************************************************************/ |
frank26080115 | 0:84d7747641aa | 157 | void WDT_Init (WDT_CLK_OPT ClkSrc, WDT_MODE_OPT WDTMode) |
frank26080115 | 0:84d7747641aa | 158 | { |
frank26080115 | 0:84d7747641aa | 159 | CHECK_PARAM(PARAM_WDT_CLK_OPT(ClkSrc)); |
frank26080115 | 0:84d7747641aa | 160 | CHECK_PARAM(PARAM_WDT_MODE_OPT(WDTMode)); |
frank26080115 | 0:84d7747641aa | 161 | CLKPWR_SetPCLKDiv (CLKPWR_PCLKSEL_WDT, CLKPWR_PCLKSEL_CCLK_DIV_4); |
frank26080115 | 0:84d7747641aa | 162 | |
frank26080115 | 0:84d7747641aa | 163 | //Set clock source |
frank26080115 | 0:84d7747641aa | 164 | LPC_WDT->WDCLKSEL &= ~WDT_WDCLKSEL_MASK; |
frank26080115 | 0:84d7747641aa | 165 | LPC_WDT->WDCLKSEL |= ClkSrc; |
frank26080115 | 0:84d7747641aa | 166 | //Set WDT mode |
frank26080115 | 0:84d7747641aa | 167 | if (WDTMode == WDT_MODE_RESET){ |
frank26080115 | 0:84d7747641aa | 168 | LPC_WDT->WDMOD |= WDT_WDMOD(WDTMode); |
frank26080115 | 0:84d7747641aa | 169 | } |
frank26080115 | 0:84d7747641aa | 170 | } |
frank26080115 | 0:84d7747641aa | 171 | |
frank26080115 | 0:84d7747641aa | 172 | /*********************************************************************//** |
frank26080115 | 0:84d7747641aa | 173 | * @brief Start WDT activity with given timeout value |
frank26080115 | 0:84d7747641aa | 174 | * @param[in] TimeOut WDT reset after timeout if it is not feed |
frank26080115 | 0:84d7747641aa | 175 | * @return None |
frank26080115 | 0:84d7747641aa | 176 | **********************************************************************/ |
frank26080115 | 0:84d7747641aa | 177 | void WDT_Start(uint32_t TimeOut) |
frank26080115 | 0:84d7747641aa | 178 | { |
frank26080115 | 0:84d7747641aa | 179 | uint32_t ClkSrc; |
frank26080115 | 0:84d7747641aa | 180 | |
frank26080115 | 0:84d7747641aa | 181 | ClkSrc = LPC_WDT->WDCLKSEL; |
frank26080115 | 0:84d7747641aa | 182 | ClkSrc &=WDT_WDCLKSEL_MASK; |
frank26080115 | 0:84d7747641aa | 183 | WDT_SetTimeOut(ClkSrc,TimeOut); |
frank26080115 | 0:84d7747641aa | 184 | //enable watchdog |
frank26080115 | 0:84d7747641aa | 185 | LPC_WDT->WDMOD |= WDT_WDMOD_WDEN; |
frank26080115 | 0:84d7747641aa | 186 | WDT_Feed(); |
frank26080115 | 0:84d7747641aa | 187 | } |
frank26080115 | 0:84d7747641aa | 188 | |
frank26080115 | 0:84d7747641aa | 189 | /********************************************************************//** |
frank26080115 | 0:84d7747641aa | 190 | * @brief Read WDT Time out flag |
frank26080115 | 0:84d7747641aa | 191 | * @param[in] None |
frank26080115 | 0:84d7747641aa | 192 | * @return Time out flag status of WDT |
frank26080115 | 0:84d7747641aa | 193 | *********************************************************************/ |
frank26080115 | 0:84d7747641aa | 194 | FlagStatus WDT_ReadTimeOutFlag (void) |
frank26080115 | 0:84d7747641aa | 195 | { |
frank26080115 | 0:84d7747641aa | 196 | return ((FlagStatus)((LPC_WDT->WDMOD & WDT_WDMOD_WDTOF) >>2)); |
frank26080115 | 0:84d7747641aa | 197 | } |
frank26080115 | 0:84d7747641aa | 198 | |
frank26080115 | 0:84d7747641aa | 199 | /********************************************************************//** |
frank26080115 | 0:84d7747641aa | 200 | * @brief Clear WDT Time out flag |
frank26080115 | 0:84d7747641aa | 201 | * @param[in] None |
frank26080115 | 0:84d7747641aa | 202 | * @return None |
frank26080115 | 0:84d7747641aa | 203 | *********************************************************************/ |
frank26080115 | 0:84d7747641aa | 204 | void WDT_ClrTimeOutFlag (void) |
frank26080115 | 0:84d7747641aa | 205 | { |
frank26080115 | 0:84d7747641aa | 206 | LPC_WDT->WDMOD &=~WDT_WDMOD_WDTOF; |
frank26080115 | 0:84d7747641aa | 207 | } |
frank26080115 | 0:84d7747641aa | 208 | |
frank26080115 | 0:84d7747641aa | 209 | /********************************************************************//** |
frank26080115 | 0:84d7747641aa | 210 | * @brief Update WDT timeout value and feed |
frank26080115 | 0:84d7747641aa | 211 | * @param[in] TimeOut TimeOut value to be updated |
frank26080115 | 0:84d7747641aa | 212 | * @return None |
frank26080115 | 0:84d7747641aa | 213 | *********************************************************************/ |
frank26080115 | 0:84d7747641aa | 214 | void WDT_UpdateTimeOut ( uint32_t TimeOut) |
frank26080115 | 0:84d7747641aa | 215 | { |
frank26080115 | 0:84d7747641aa | 216 | uint32_t ClkSrc; |
frank26080115 | 0:84d7747641aa | 217 | ClkSrc = LPC_WDT->WDCLKSEL; |
frank26080115 | 0:84d7747641aa | 218 | ClkSrc &=WDT_WDCLKSEL_MASK; |
frank26080115 | 0:84d7747641aa | 219 | WDT_SetTimeOut(ClkSrc,TimeOut); |
frank26080115 | 0:84d7747641aa | 220 | WDT_Feed(); |
frank26080115 | 0:84d7747641aa | 221 | } |
frank26080115 | 0:84d7747641aa | 222 | |
frank26080115 | 0:84d7747641aa | 223 | |
frank26080115 | 0:84d7747641aa | 224 | /********************************************************************//** |
frank26080115 | 0:84d7747641aa | 225 | * @brief After set WDTEN, call this function to start Watchdog |
frank26080115 | 0:84d7747641aa | 226 | * or reload the Watchdog timer |
frank26080115 | 0:84d7747641aa | 227 | * @param[in] None |
frank26080115 | 0:84d7747641aa | 228 | * |
frank26080115 | 0:84d7747641aa | 229 | * @return None |
frank26080115 | 0:84d7747641aa | 230 | *********************************************************************/ |
frank26080115 | 0:84d7747641aa | 231 | void WDT_Feed (void) |
frank26080115 | 0:84d7747641aa | 232 | { |
frank26080115 | 0:84d7747641aa | 233 | // Disable irq interrupt |
frank26080115 | 0:84d7747641aa | 234 | __disable_irq(); |
frank26080115 | 0:84d7747641aa | 235 | LPC_WDT->WDFEED = 0xAA; |
frank26080115 | 0:84d7747641aa | 236 | LPC_WDT->WDFEED = 0x55; |
frank26080115 | 0:84d7747641aa | 237 | // Then enable irq interrupt |
frank26080115 | 0:84d7747641aa | 238 | __enable_irq(); |
frank26080115 | 0:84d7747641aa | 239 | } |
frank26080115 | 0:84d7747641aa | 240 | |
frank26080115 | 0:84d7747641aa | 241 | /********************************************************************//** |
frank26080115 | 0:84d7747641aa | 242 | * @brief Get the current value of WDT |
frank26080115 | 0:84d7747641aa | 243 | * @param[in] None |
frank26080115 | 0:84d7747641aa | 244 | * @return current value of WDT |
frank26080115 | 0:84d7747641aa | 245 | *********************************************************************/ |
frank26080115 | 0:84d7747641aa | 246 | uint32_t WDT_GetCurrentCount(void) |
frank26080115 | 0:84d7747641aa | 247 | { |
frank26080115 | 0:84d7747641aa | 248 | return LPC_WDT->WDTV; |
frank26080115 | 0:84d7747641aa | 249 | } |
frank26080115 | 0:84d7747641aa | 250 | |
frank26080115 | 0:84d7747641aa | 251 | /** |
frank26080115 | 0:84d7747641aa | 252 | * @} |
frank26080115 | 0:84d7747641aa | 253 | */ |
frank26080115 | 0:84d7747641aa | 254 | |
frank26080115 | 0:84d7747641aa | 255 | #endif /* _WDT */ |
frank26080115 | 0:84d7747641aa | 256 | |
frank26080115 | 0:84d7747641aa | 257 | /** |
frank26080115 | 0:84d7747641aa | 258 | * @} |
frank26080115 | 0:84d7747641aa | 259 | */ |
frank26080115 | 0:84d7747641aa | 260 | |
frank26080115 | 0:84d7747641aa | 261 | /* --------------------------------- End Of File ------------------------------ */ |