Merge branch 'bugfix/uart_read_o2' into 'master'

hal: workaround for UART FIFO read on ESP32 with -O2 optimization

Closes IDFCI-97

See merge request espressif/esp-idf!10263
This commit is contained in:
Ivan Grokhotkov 2020-09-08 00:01:48 +08:00
commit 3a51584fbb

View File

@ -170,6 +170,9 @@ static inline void uart_ll_read_rxfifo(uart_dev_t *hw, uint8_t *buf, uint32_t rd
uint32_t fifo_addr = (hw == &UART0) ? UART_FIFO_REG(0) : (hw == &UART1) ? UART_FIFO_REG(1) : UART_FIFO_REG(2);
for(int i = 0; i < rd_len; i++) {
buf[i] = READ_PERI_REG(fifo_addr);
#ifdef CONFIG_COMPILER_OPTIMIZATION_PERF
__asm__ __volatile__("nop");
#endif
}
}