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cpu/stm32: Fix 16 bit reg endianess for i2c_1

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Since i2c_1 i2c_write_regs is cpu specific reg endianess must be swapped there
Change reg from little endian to big endian
This commit is contained in:
MrKevinWeiss 2019-08-16 15:04:13 +02:00
parent 3e753834e7
commit b0c05431f7
1 changed files with 5 additions and 0 deletions
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5
cpu/stm32_common/periph/i2c_1.c
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@ -37,6 +37,7 @@
#include "cpu.h"
#include "mutex.h"
#include "byteorder.h"
#include "cpu_conf_stm32_common.h"
@ -169,6 +170,10 @@ int i2c_write_regs(i2c_t dev, uint16_t addr, uint16_t reg,
if (i2c->ISR & I2C_ISR_BUSY) {
return -EAGAIN;
}
/* Handle endianess of register if 16 bit */
if (flags & I2C_REG16) {
reg = htons(reg); /* Make sure register is in big-endian on I2C bus */
}
/* First set ADDR and register with no stop */
/* No RELOAD should be set so repeated start is valid */
int ret = _write(i2c, addr, &reg, (flags & I2C_REG16) ? 2 : 1,