Revision 0:f4b9a1ec4c5f, committed 2014-11-05
- Comitter:
- aAXEe
- Date:
- Wed Nov 05 06:56:32 2014 +0000
- Commit message:
- Basic FRAM handling working
Changed in this revision
diff -r 000000000000 -r f4b9a1ec4c5f main.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Wed Nov 05 06:56:32 2014 +0000
@@ -0,0 +1,99 @@
+#include "mbed.h"
+
+I2C i2c(I2C_SDA, I2C_SCL);
+
+#define FRAM_BASEADDR (0xA) // A7 .. A4
+
+uint8_t fram_calcAddr(uint8_t pageAdr, bool receiveBit){
+ return FRAM_BASEADDR << 4 | ((pageAdr<<1) & 0xf) | receiveBit;
+}
+
+bool fram_sendAddr(uint8_t pageAdr, uint8_t wordAdr, bool receiveBit){
+ uint8_t addr = fram_calcAddr(pageAdr, receiveBit);
+// printf("addr: %X\n", addr);
+ return !i2c.write(fram_calcAddr(pageAdr, receiveBit), (const char*)&wordAdr, 1, 1);
+}
+
+bool fram_write(uint8_t pageAdr, uint8_t wordAdr, uint8_t* buf, uint16_t dataLength){
+ int ret;
+
+ ret = fram_sendAddr(pageAdr, wordAdr, false);
+ if(ret != 1){
+ printf("write: addressing failed\n");
+ i2c.stop();
+ return false;
+ }
+
+ for(int i=0; i<dataLength;++i){
+ ret = i2c.write(buf[i]);
+ if(ret != 1){
+ printf("write: writing data %i failed\n", i);
+ i2c.stop();
+ return false;
+ }
+ }
+ i2c.stop();
+ return true;
+}
+
+bool fram_read(uint8_t pageAdr, uint8_t wordAdr, uint8_t* buf, uint16_t dataLength){
+ int ret;
+
+ ret = fram_sendAddr(pageAdr, wordAdr, false);
+ if(ret != 1){
+ printf("read: addressing failed\n");
+ i2c.stop();
+ return false;
+ }
+
+ ret = i2c.read(fram_calcAddr(pageAdr, true), (char*)buf, dataLength, 0);
+ if(ret != 0){
+ printf("Read data failed!");
+ return false;
+ }
+
+ return true;
+}
+
+
+Serial pc(SERIAL_TX, SERIAL_RX);
+
+bool fram_test(){
+ int i, ret;
+ const int length = 600;
+ uint8_t buf[length];
+
+ printf("FRAM Test\n");
+ for(i=0; i<length; ++i)
+ buf[i] = i;
+
+ ret = fram_write(0, 0, buf, length);
+ printf("write: %i\n", ret);
+ if(!ret) return false;
+
+
+ ret = fram_read(0, 0, buf, length);
+ printf("read: %i\n", ret);
+ if(!ret) return false;
+
+
+ for(i=0; i<length; ++i)
+ if(buf[i] != (uint8_t)i){
+ printf("data mismatch: i: %i buf[i]: %i (uint8_t)i: %i\n", i, buf[i], (uint8_t)i);
+ return false;
+ }
+
+ return true;
+}
+
+int main()
+{
+
+ printf("Hello FRAM\n");
+ while (1) {
+ pc.printf("fram_test: %i\n", fram_test());
+ wait(1.0);
+ }
+
+}
+
diff -r 000000000000 -r f4b9a1ec4c5f mbed.bld
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld Wed Nov 05 06:56:32 2014 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed/builds/031413cf7a89
\ No newline at end of file