Revision 0:a9d57902bf67, committed 2015-02-05

Comitter:

RedBearLab

Date:

Thu Feb 05 03:16:51 2015 +0000

Child:

1:b6853f8b28d1

Commit message:

Mbed i2c library demo with at24cxxx on Readbear nRF51822

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Thu Feb 05 03:16:51 2015 +0000
@@ -0,0 +1,88 @@
+
+#include "mbed.h"
+
+#define DEV_ADDR    0xA0
+
+I2C     i2c(P0_29, P0_28);
+Serial  pc(USBTX, USBRX);
+
+/**********************************************************************
+* @brief            :  Write data to AT24C512
+* 
+* @param[in] addr   : The address of stored
+* @param[in] *pbuf  : The pointer of data
+* @param[in] length : The length of data
+*
+* @return none
+**********************************************************************/
+void AT24C512_WriteBytes(uint16_t addr, uint8_t *pbuf, uint16_t length)
+{
+    char buf[length+2];
+    buf[0] = (uint8_t)(addr>>8);
+    buf[1] = (uint8_t)(addr);
+    memcpy(&buf[2], pbuf, length); 
+    i2c.write(DEV_ADDR, buf, length+2, false);
+}
+/**********************************************************************
+* @brief            :  Read data from AT24C512
+* 
+* @param[in] addr   : The address of read in AT24C512
+* @param[out] *pbuf : The pointer of buffer 
+* @param[in] length : The length of data
+*
+* @return none
+**********************************************************************/
+void AT24C512_ReadBytes(uint16_t addr, uint8_t *pbuf, uint16_t length)
+{
+    char buf[2];
+    buf[0] = (uint8_t)(addr>>8);
+    buf[1] = (uint8_t)(addr);
+    i2c.write(DEV_ADDR, buf, 2, false);
+    
+    i2c.read(DEV_ADDR, (char *)pbuf, length, false);
+}
+
+
+uint8_t w_buf[11]={'H', 'e', 'l', 'l', 'o', 'W', 'o', 'r', 'l', 'd', '!'};
+uint8_t r_buf[11];
+
+
+int main(void)
+{
+    uint8_t index;
+    
+    pc.baud(9600);
+    pc.printf("IIC Demo Start \r\n");
+    
+    while(1)
+    {
+        wait(2);
+        AT24C512_WriteBytes(0, w_buf, 11);
+        wait(0.5);
+        AT24C512_ReadBytes(0, r_buf, 11);
+        for(index=0; index<11; index++)
+         pc.putc(r_buf[index]);
+         
+        pc.printf("\r\n");
+    }
+}
+
+
+
+
+
+
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+
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+
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+
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+

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Thu Feb 05 03:16:51 2015 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed/builds/e188a91d3eaa
\ No newline at end of file