uart_div_modify failed in boot!
Posted: Tue Oct 20, 2015 4:25 amHi: the ESP8266 standard boot-vx.x.bin did not meet our requirement. i write another boot firmware. the UART driver is copy from normal firmware(USER1/USER2), it's working fine. but it in boot firmware. it's seem the baudrate setting is wrong.
difference between these 2 UART driver:
1) boot uart driver no interrupt support
2) boot uart driver all function run in RAM. no ICACHE_FLASH_ATTR.
baudrate at 230400: send are 0xC0, 0x16, 0x06, 0x40, 0x00, 0x00, 0xxx, 0xxx, 0xC0, receive are 0x90, 0x8a, 0x40, 0xd9, 0xf0
could someone tell me why the uart_div_modify() failed?
difference between these 2 UART driver:
1) boot uart driver no interrupt support
2) boot uart driver all function run in RAM. no ICACHE_FLASH_ATTR.
baudrate at 230400: send are 0xC0, 0x16, 0x06, 0x40, 0x00, 0x00, 0xxx, 0xxx, 0xC0, receive are 0x90, 0x8a, 0x40, 0xd9, 0xf0
could someone tell me why the uart_div_modify() failed?