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[NUCLEO_F072R8] enhance I2C for EEPROM

pull/383/head
dbestm 2014-07-01 11:11:16 +02:00
parent a85701deae
commit 32e5859bed
1 changed files with 5 additions and 13 deletions
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18
libraries/mbed/targets/hal/TARGET_STM/TARGET_NUCLEO_F072RB/i2c_api.c
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@ -159,8 +159,6 @@ int i2c_read(i2c_t *obj, int address, char *data, int length, int stop) {
int count; int count;
int value; int value;
if (length == 0) return 0;
/* update CR2 register */ /* update CR2 register */
i2c->CR2 = (i2c->CR2 & (uint32_t)~((uint32_t)(I2C_CR2_SADD | I2C_CR2_NBYTES | I2C_CR2_RELOAD | I2C_CR2_AUTOEND | I2C_CR2_RD_WRN | I2C_CR2_START | I2C_CR2_STOP))) i2c->CR2 = (i2c->CR2 & (uint32_t)~((uint32_t)(I2C_CR2_SADD | I2C_CR2_NBYTES | I2C_CR2_RELOAD | I2C_CR2_AUTOEND | I2C_CR2_RD_WRN | I2C_CR2_START | I2C_CR2_STOP)))
| (uint32_t)(((uint32_t)address & I2C_CR2_SADD) | (((uint32_t)length << 16) & I2C_CR2_NBYTES) | (uint32_t)I2C_SOFTEND_MODE | (uint32_t)I2C_GENERATE_START_READ); | (uint32_t)(((uint32_t)address & I2C_CR2_SADD) | (((uint32_t)length << 16) & I2C_CR2_NBYTES) | (uint32_t)I2C_SOFTEND_MODE | (uint32_t)I2C_GENERATE_START_READ);
@ -176,7 +174,7 @@ int i2c_read(i2c_t *obj, int address, char *data, int length, int stop) {
while (__HAL_I2C_GET_FLAG(&I2cHandle, I2C_FLAG_TC) == RESET) { while (__HAL_I2C_GET_FLAG(&I2cHandle, I2C_FLAG_TC) == RESET) {
timeout--; timeout--;
if (timeout == 0) { if (timeout == 0) {
return 0; return -1;
} }
} }
__HAL_I2C_CLEAR_FLAG(&I2cHandle, I2C_FLAG_TC); __HAL_I2C_CLEAR_FLAG(&I2cHandle, I2C_FLAG_TC);
@ -189,7 +187,7 @@ int i2c_read(i2c_t *obj, int address, char *data, int length, int stop) {
while (__HAL_I2C_GET_FLAG(&I2cHandle, I2C_FLAG_STOPF) == RESET) { while (__HAL_I2C_GET_FLAG(&I2cHandle, I2C_FLAG_STOPF) == RESET) {
timeout--; timeout--;
if (timeout == 0) { if (timeout == 0) {
return 0; return -1;
} }
} }
/* Clear STOP Flag */ /* Clear STOP Flag */
@ -205,8 +203,6 @@ int i2c_write(i2c_t *obj, int address, const char *data, int length, int stop) {
int timeout; int timeout;
int count; int count;
if (length == 0) return 0;
/* update CR2 register */ /* update CR2 register */
i2c->CR2 = (i2c->CR2 & (uint32_t)~((uint32_t)(I2C_CR2_SADD | I2C_CR2_NBYTES | I2C_CR2_RELOAD | I2C_CR2_AUTOEND | I2C_CR2_RD_WRN | I2C_CR2_START | I2C_CR2_STOP))) i2c->CR2 = (i2c->CR2 & (uint32_t)~((uint32_t)(I2C_CR2_SADD | I2C_CR2_NBYTES | I2C_CR2_RELOAD | I2C_CR2_AUTOEND | I2C_CR2_RD_WRN | I2C_CR2_START | I2C_CR2_STOP)))
| (uint32_t)(((uint32_t)address & I2C_CR2_SADD) | (((uint32_t)length << 16) & I2C_CR2_NBYTES) | (uint32_t)I2C_SOFTEND_MODE | (uint32_t)I2C_GENERATE_START_WRITE); | (uint32_t)(((uint32_t)address & I2C_CR2_SADD) | (((uint32_t)length << 16) & I2C_CR2_NBYTES) | (uint32_t)I2C_SOFTEND_MODE | (uint32_t)I2C_GENERATE_START_WRITE);
@ -222,7 +218,7 @@ int i2c_write(i2c_t *obj, int address, const char *data, int length, int stop) {
while (__HAL_I2C_GET_FLAG(&I2cHandle, I2C_FLAG_TC) == RESET) { while (__HAL_I2C_GET_FLAG(&I2cHandle, I2C_FLAG_TC) == RESET) {
timeout--; timeout--;
if (timeout == 0) { if (timeout == 0) {
return 0; return -1;
} }
} }
__HAL_I2C_CLEAR_FLAG(&I2cHandle, I2C_FLAG_TC); __HAL_I2C_CLEAR_FLAG(&I2cHandle, I2C_FLAG_TC);
@ -235,7 +231,7 @@ int i2c_write(i2c_t *obj, int address, const char *data, int length, int stop) {
while (__HAL_I2C_GET_FLAG(&I2cHandle, I2C_FLAG_STOPF) == RESET) { while (__HAL_I2C_GET_FLAG(&I2cHandle, I2C_FLAG_STOPF) == RESET) {
timeout--; timeout--;
if (timeout == 0) { if (timeout == 0) {
return 0; return -1;
} }
} }
/* Clear STOP Flag */ /* Clear STOP Flag */
@ -253,7 +249,7 @@ int i2c_byte_read(i2c_t *obj, int last) {
timeout = FLAG_TIMEOUT; timeout = FLAG_TIMEOUT;
while (__HAL_I2C_GET_FLAG(&I2cHandle, I2C_FLAG_RXNE) == RESET) { while (__HAL_I2C_GET_FLAG(&I2cHandle, I2C_FLAG_RXNE) == RESET) {
if ((timeout--) == 0) { if ((timeout--) == 0) {
return 0; return -1;
} }
} }
@ -355,8 +351,6 @@ int i2c_slave_receive(i2c_t *obj) {
int i2c_slave_read(i2c_t *obj, char *data, int length) { int i2c_slave_read(i2c_t *obj, char *data, int length) {
char size = 0; char size = 0;
if (length == 0) return 0;
while (size < length) data[size++] = (char)i2c_byte_read(obj, 0); while (size < length) data[size++] = (char)i2c_byte_read(obj, 0);
return size; return size;
@ -366,8 +360,6 @@ int i2c_slave_write(i2c_t *obj, const char *data, int length) {
char size = 0; char size = 0;
I2cHandle.Instance = (I2C_TypeDef *)(obj->i2c); I2cHandle.Instance = (I2C_TypeDef *)(obj->i2c);
if (length == 0) return 0;
do { do {
i2c_byte_write(obj, data[size]); i2c_byte_write(obj, data[size]);
size++; size++;