Tomas Cerskus / USBDevice

USB device stack with Nucleo F401RE support. NOTE: the default clock config needs to be changed to in order for USB to work.

Fork of USBDevice by Tomas Cerskus

Slightly modified original USBDevice library to support F401RE.

On F401RE the data pins of your USB connector should be attached to PA12 (D+) and PA11(D-). It is also required to connect the +5V USB line to PA9.

F401RE requires 48MHz clock for USB. Therefore in order for this to work you will need to change the default clock settings:

Clock settings for USB

#include "stm32f4xx_hal.h"

RCC_OscInitTypeDef RCC_OscInitStruct;
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
RCC_OscInitStruct.HSIState = RCC_HSI_ON;
RCC_OscInitStruct.HSICalibrationValue = 16;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
RCC_OscInitStruct.PLL.PLLM = 16;
RCC_OscInitStruct.PLL.PLLN = 336;
RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV4;
RCC_OscInitStruct.PLL.PLLQ = 7;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
    error("RTC error: LSI clock initialization failed."); 
}

NOTE: Changing the clock frequency might affect the behavior of other libraries. I only tested the Serial library.

UPDATE: Clock settings should not to be changed anymore! Looks like the newer mbed library has the required clock enabled.

Files at this revision

API Documentation at this revision

Revision 20:d38b72fed893, committed 2014-02-27

Comitter:
mbed_official
Date:
Thu Feb 27 09:45:46 2014 +0000
Parent:
19:fcb63a105965
Child:
21:ee9f2fa6bdbc
Commit message:
Synchronized with git revision 6b57b5237463a65d25f0ffa5efa3c8505553da4b

Full URL: https://github.com/mbedmicro/mbed/commit/6b57b5237463a65d25f0ffa5efa3c8505553da4b/

add D0-D13 and A0-A5 for Arch V1.1 and Arch Pro

Changed in this revision

USBDevice/USBEndpoints.h Show annotated file Show diff for this revision Revisions of this file
USBDevice/USBHAL_KL25Z.cpp Show annotated file Show diff for this revision Revisions of this file 
--- a/USBDevice/USBEndpoints.h	Thu Feb 20 11:15:58 2014 +0000
+++ b/USBDevice/USBEndpoints.h	Thu Feb 27 09:45:46 2014 +0000
@@ -41,7 +41,7 @@
 #include "USBEndpoints_LPC17_LPC23.h"
 #elif defined(TARGET_LPC11UXX) || defined(TARGET_LPC1347)
 #include "USBEndpoints_LPC11U.h"
-#elif defined(TARGET_KL25Z)
+#elif defined(TARGET_KL25Z) | defined(TARGET_KL46Z) | defined(TARGET_K20D5M)
 #include "USBEndpoints_KL25Z.h"
 #elif defined (TARGET_STM32F4XX)
 #include "USBEndpoints_STM32F4.h"

--- a/USBDevice/USBHAL_KL25Z.cpp	Thu Feb 20 11:15:58 2014 +0000
+++ b/USBDevice/USBHAL_KL25Z.cpp	Thu Feb 27 09:45:46 2014 +0000
@@ -16,7 +16,7 @@
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
 
-#if defined(TARGET_KL25Z)
+#if defined(TARGET_KL25Z) | defined(TARGET_KL46Z) | defined(TARGET_K20D5M)
 
 #include "USBHAL.h"
 
@@ -59,7 +59,7 @@
     uint8_t   dummy;      // RSVD: BD[8:15]
     uint16_t  byte_count; // BD[16:32]
     uint32_t  address;    // Addr
-} BDT; 
+} BDT;
 
 
 // there are:
@@ -82,10 +82,10 @@
     return 0;
 }
 
-USBHAL::USBHAL(void) {    
+USBHAL::USBHAL(void) {
     // Disable IRQ
     NVIC_DisableIRQ(USB0_IRQn);
-    
+
     // fill in callback array
     epCallback[0] = &USBHAL::EP1_OUT_callback;
     epCallback[1] = &USBHAL::EP1_IN_callback;
@@ -117,11 +117,11 @@
     epCallback[27] = &USBHAL::EP14_IN_callback;
     epCallback[28] = &USBHAL::EP15_OUT_callback;
     epCallback[29] = &USBHAL::EP15_IN_callback;
-    
-    
+
+
     // choose usb src as PLL
     SIM->SOPT2 |= (SIM_SOPT2_USBSRC_MASK | SIM_SOPT2_PLLFLLSEL_MASK);
-    
+
     // enable OTG clock
     SIM->SCGC4 |= SIM_SCGC4_USBOTG_MASK;
 
@@ -129,12 +129,12 @@
     instance = this;
     NVIC_SetVector(USB0_IRQn, (uint32_t)&_usbisr);
     NVIC_EnableIRQ(USB0_IRQn);
-    
+
     // USB Module Configuration
     // Reset USB Module
     USB0->USBTRC0 |= USB_USBTRC0_USBRESET_MASK;
     while(USB0->USBTRC0 & USB_USBTRC0_USBRESET_MASK);
-    
+
     // Set BDT Base Register
     USB0->BDTPAGE1=(uint8_t)((uint32_t)bdt>>8);
     USB0->BDTPAGE2=(uint8_t)((uint32_t)bdt>>16);
@@ -144,14 +144,14 @@
     USB0->ISTAT = 0xff;
 
     // USB Interrupt Enablers
-    USB0->INTEN |= USB_INTEN_TOKDNEEN_MASK | 
-                   USB_INTEN_SOFTOKEN_MASK | 
+    USB0->INTEN |= USB_INTEN_TOKDNEEN_MASK |
+                   USB_INTEN_SOFTOKEN_MASK |
                    USB_INTEN_ERROREN_MASK  |
                    USB_INTEN_USBRSTEN_MASK;
-    
-    // Disable weak pull downs 
-    USB0->USBCTRL &= ~(USB_USBCTRL_PDE_MASK | USB_USBCTRL_SUSP_MASK);   
-    
+
+    // Disable weak pull downs
+    USB0->USBCTRL &= ~(USB_USBCTRL_PDE_MASK | USB_USBCTRL_SUSP_MASK);
+
     USB0->USBTRC0 |= 0x40;
 }
 
@@ -296,9 +296,9 @@
     uint32_t n, sz, idx, setup = 0;
     uint8_t not_iso;
     uint8_t * ep_buf;
-    
+
     uint32_t log_endpoint = PHY_TO_LOG(endpoint);
-    
+
     if (endpoint > NUMBER_OF_PHYSICAL_ENDPOINTS - 1) {
         return EP_INVALID;
     }
@@ -335,7 +335,7 @@
     if (((Data1 >> endpoint) & 1) == ((bdt[idx].info >> 6) & 1)) {
         if (setup && (buffer[6] == 0))  // if no setup data stage,
             Data1 &= ~1UL;              // set DATA0
-        else 
+        else
             Data1 ^= (1 << endpoint);
     }
 
@@ -345,7 +345,7 @@
     else {
         bdt[idx].info = BD_DTS_MASK | BD_OWN_MASK;
     }
-        
+
     USB0->CTL &= ~USB_CTL_TXSUSPENDTOKENBUSY_MASK;
     *bytesRead = sz;
 
@@ -368,27 +368,27 @@
 
     idx = EP_BDT_IDX(PHY_TO_LOG(endpoint), TX, 0);
     bdt[idx].byte_count = size;
-    
-    
+
+
     // non iso endpoint
     if (USB0->ENDPOINT[PHY_TO_LOG(endpoint)].ENDPT & USB_ENDPT_EPHSHK_MASK) {
         ep_buf = endpoint_buffer[idx];
     } else {
         ep_buf = endpoint_buffer_iso[2];
     }
-    
+
     for (n = 0; n < size; n++) {
         ep_buf[n] = data[n];
     }
-    
+
     if ((Data1 >> endpoint) & 1) {
         bdt[idx].info = BD_OWN_MASK | BD_DTS_MASK;
     } else {
         bdt[idx].info = BD_OWN_MASK | BD_DTS_MASK | BD_DATA01_MASK;
     }
-    
+
     Data1 ^= (1 << endpoint);
-    
+
     return EP_PENDING;
 }
 
@@ -429,7 +429,7 @@
     uint8_t istat = USB0->ISTAT;
 
     // reset interrupt
-    if (istat & USB_ISTAT_USBRST_MASK) {            
+    if (istat & USB_ISTAT_USBRST_MASK) {
         // disable all endpt
         for(i = 0; i < 16; i++) {
             USB0->ENDPOINT[i].ENDPT = 0x00;
@@ -457,11 +457,11 @@
 
     // SOF interrupt
     if (istat & USB_ISTAT_SOFTOK_MASK) {
-        USB0->ISTAT = USB_ISTAT_SOFTOK_MASK;  
+        USB0->ISTAT = USB_ISTAT_SOFTOK_MASK;
         // SOF event, read frame number
         SOF(frameNumber());
     }
-    
+
     // stall interrupt
     if (istat & 1<<7) {
         if (USB0->ENDPOINT[0].ENDPT & USB_ENDPT_EPSTALL_MASK)
@@ -483,7 +483,7 @@
 
             // EP0 SETUP event (SETUP data received)
             EP0setupCallback();
-                    
+
         } else {
             // OUT packet
             if (TOK_PID((EP_BDT_IDX(num, dir, ev_odd))) == OUT_TOKEN) {
@@ -517,11 +517,11 @@
 
         USB0->ISTAT = USB_ISTAT_TOKDNE_MASK;
     }
-        
+
     // sleep interrupt
     if (istat & 1<<4) {
         USB0->ISTAT |= USB_ISTAT_SLEEP_MASK;
-    }    
+    }
 
     // error interrupt
     if (istat & USB_ISTAT_ERROR_MASK) {