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kendryte / kendryte-standalone-sdk

Standalone SDK for kendryte K210
https://kendryte.com
Apache License 2.0
445 stars 162 forks source link

UARTHS and UART send big size data lost data #73

Open Neutree opened 5 years ago

Neutree commented 5 years ago

https://github.com/kendryte/kendryte-standalone-sdk/blob/78d98ae932df196579e1b9541b07435463d5d15d/lib/drivers/uarths.c#L117-L126

When send big size data like 3K may lose data (with baudrate 921600 or 2000000)

zzxcanaan commented 5 years ago

Lost data when baudrate 2M on KD233 board, because the ch340 support maximum 2M. Please tell me your operating environment and test code.

Neutree commented 5 years ago

uart test code:


#include <stdio.h>
#include "fpioa.h"
#include <string.h>
#include "uart.h"
#include "gpiohs.h"
#include "sysctl.h"
#include "sleep.h"

#define UART_NUM    UART_DEVICE_1

uint8_t jpeg[] ={0xFF, 0xD8, 0xFF, 0xE0, 0x00, 0x10, 0x4A, 0x46, 0x49, 0x46, 0x00, 0x01, 0x01, 0x00, 0x00, 0x01, 0x00, 0x01, 0x00, 0x00, 0xFF, 0xDB, 0x00, 0x84, 0x00, 0x16, 0x0F, 0x11, 0x13, 0x11, 0x0E, 0x16, 0x13, 0x12, 0x13, 0x19, 0x17, 0x16, 0x1A, 0x21, 0x37, 0x24, 0x21, 0x1E, 0x1E, 0x21, 0x44, 0x30, 0x33, 0x28, 0x37, 0x50, 0x46, 0x54, 0x53, 0x4F, 0x46, 0x4D, 0x4C, 0x58, 0x63, 0x7F, 0x6C, 0x58, 0x5E, 0x78, 0x5F, 0x4C, 0x4D, 0x6E, 0x96, 0x70, 0x78, 0x83, 0x87, 0x8E, 0x90, 0x8E, 0x56, 0x6A, 0x9C, 0xA7, 0x9B, 0x8A, 0xA6, 0x7F, 0x8B, 0x8E, 0x89, 0x01, 0x17, 0x19, 0x19, 0x21, 0x1D, 0x21, 0x41, 0x24, 0x24, 0x41, 0x89, 0x5B, 0x4D, 0x5B, 0x89, 0x89, 0x89, 0x89, 0x89, 0x89, 0x89, 0x89, 0x89, 0x89, 0x89, 0x89, 0x89, 0x89, 0x89, 0x89, 0x89, 0x89, 0x89, 0x89, 0x89, 0x89, 0x89, 0x89, 0x89, 0x89, 0x89, 0x89, 0x89, 0x89, 0x89, 0x89, 0x89, 0x89, 0x89, 0x89, 0x89, 0x89, 0x89, 0x89, 0x89, 0x89, 0x89, 0x89, 0x89, 0x89, 0x89, 0x89, 0x89, 0x89, 0xFF, 0xC0, 0x00, 0x11, 0x08, 0x00, 0xF0, 0x01, 0x40, 0x03, 0x01, 0x21, 0x00, 0x02, 0x11, 0x01, 0x03, 0x11, 0x01, 0xFF, 0xC4, 0x01, 0xA2, 0x00, 0x00, 0x01, 0x05, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x10, 0x00, 0x02, 0x01, 0x03, 0x03, 0x02, 0x04, 0x03, 0x05, 0x05, 0x04, 0x04, 0x00, 0x00, 0x01, 0x7D, 0x01, 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12, 0x21, 0x31, 0x41, 0x06, 0x13, 0x51, 0x61, 0x07, 0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xA1, 0x08, 0x23, 0x42, 0xB1, 0xC1, 0x15, 0x52, 0xD1, 0xF0, 0x24, 0x33, 0x62, 0x72, 0x82, 0x09, 0x0A, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4A, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5A, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6A, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9A, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6, 0xA7, 0xA8, 0xA9, 0xAA, 0xB2, 0xB3, 0xB4, 0xB5, 0xB6, 0xB7, 0xB8, 0xB9, 0xBA, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7, 0xC8, 0xC9, 0xCA, 0xD2, 0xD3, 0xD4, 0xD5, 0xD6, 0xD7, 0xD8, 0xD9, 0xDA, 0xE1, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7, 0xE8, 0xE9, 0xEA, 0xF1, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7, 0xF8, 0xF9, 0xFA, 0x01, 0x00, 0x03, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x11, 0x00, 0x02, 0x01, 0x02, 0x04, 0x04, 0x03, 0x04, 0x07, 0x05, 0x04, 0x04, 0x00, 0x01, 0x02, 0x77, 0x00, 0x01, 0x02, 0x03, 0x11, 0x04, 0x05, 0x21, 0x31, 0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71, 0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91, 0xA1, 0xB1, 0xC1, 0x09, 0x23, 0x33, 0x52, 0xF0, 0x15, 0x62, 0x72, 0xD1, 0x0A, 0x16, 0x24, 0x34, 0xE1, 0x25, 0xF1, 0x17, 0x18, 0x19, 0x1A, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4A, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5A, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6A, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9A, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6, 0xA7, 0xA8, 0xA9, 0xAA, 0xB2, 0xB3, 0xB4, 0xB5, 0xB6, 0xB7, 0xB8, 0xB9, 0xBA, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7, 0xC8, 0xC9, 0xCA, 0xD2, 0xD3, 0xD4, 0xD5, 0xD6, 0xD7, 0xD8, 0xD9, 0xDA, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7, 0xE8, 0xE9, 0xEA, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7, 0xF8, 0xF9, 0xFA, 0xFF, 0xDA, 0x00, 0x0C, 0x03, 0x01, 0x00, 0x02, 0x11, 0x03, 0x11, 0x00, 0x3F, 0x00, 0xE4, 0xE9, 0x28, 0x10, 0xB4, 0x50, 0x01, 0x45, 0x00, 0x14, 0x50, 0x01, 0x45, 0x21, 0x05, 0x14, 0xC6, 0x14, 0xB4, 0x08, 0x28, 0xA4, 0x01, 0x45, 0x00, 0x14, 0x50, 0x30, 0xA2, 0x80, 0x0A, 0x28, 0x00, 0xA4, 0xA0, 0x10, 0x51, 0x40, 0x05, 0x14, 0x00, 0x51, 0x40, 0x05, 0x14, 0x00, 0x51, 0x40, 0x05, 0x14, 0x00, 0x94, 0xB4, 0xC0, 0x28, 0xA0, 0x41, 0x45, 0x03, 0x0A, 0x29, 0x00, 0x51, 0x4C, 0x02, 0x8A, 0x04, 0x14, 0xB4, 0x86, 0x14, 0x50, 0x20, 0xA2, 0x80, 0x0A, 0x28, 0x00, 0xA0, 0x50, 0x02, 0xD2, 0x50, 0x30, 0xA2, 0x80, 0x0A, 0x28, 0x00, 0xA2, 0x80, 0x12, 0x8A, 0x04, 0x14, 0x50, 0x01, 0x45, 0x00, 0x14, 0x50, 0x30, 0xA2, 0x80, 0x12, 0x96, 0x80, 0x0A, 0x28, 0x00, 0xA2, 0x98, 0x05, 0x14, 0x00, 0x51, 0x48, 0x02, 0x96, 0x80, 0x0A, 0x29, 0x80, 0x51, 0x48, 0x41, 0x4B, 0x40, 0xC2, 0x8A, 0x04, 0x14, 0x50, 0x30, 0xA2, 0x98, 0x82, 0x8A, 0x40, 0x14, 0x94, 0x0C, 0x28, 0xA0, 0x02, 0x8A, 0x04, 0x14, 0x94, 0x0C, 0x28, 0xA0, 0x02, 0x8A, 0x04, 0x14, 0x50, 0x30, 0xA2, 0x80, 0x0A, 0x28, 0x00, 0xA2, 0x80, 0x0A, 0x28, 0x00, 0xA2, 0x80, 0x16, 0x8A, 0x00, 0x28, 0xA0, 0x41, 0x4B, 0x40, 0x05, 0x14, 0x00, 0x52, 0xD0, 0x02, 0x52, 0xD0, 0x01, 0x45, 0x03, 0x12, 0x8A, 0x18, 0x82, 0x8A, 0x00, 0x28, 0xA0, 0x02, 0x92, 0x90, 0xC2, 0x8A, 0x60, 0x14, 0x94, 0x08, 0x28, 0xA0, 0x61, 0x45, 0x00, 0x14, 0x50, 0x01, 0x45, 0x31, 0x05, 0x14, 0x86, 0x14, 0x50, 0x02, 0xD1, 0x40, 0x05, 0x14, 0x00, 0xB4, 0x94, 0x00, 0xB4, 0x62, 0x81, 0x05, 0x2D, 0x00, 0x14, 0x50, 0x01, 0x4B, 0x40, 0x05, 0x25, 0x00, 0x14, 0x62, 0x90, 0x05, 0x14, 0x00, 0x94, 0x53, 0x00, 0xA2, 0x90, 0x05, 0x25, 0x00, 0x14, 0x53, 0x00, 0xA4, 0xA0, 0x02, 0x8A, 0x00, 0x28, 0xA0, 0x02, 0x8A, 0x06, 0x14, 0x50, 0x01, 0x4B, 0x40, 0x05, 0x14, 0x08, 0x29, 0x68, 0x18, 0x51, 0x40, 0x85, 0xA2, 0x80, 0x0A, 0x5A, 0x40, 0x14, 0x53, 0x00, 0xA2, 0x90, 0x05, 0x14, 0xC0, 0x28, 0xA4, 0x01, 0x49, 0x40, 0xC2, 0x8A, 0x04, 0x14, 0x94, 0x00, 0x51, 0x40, 0x05, 0x25, 0x31, 0x85, 0x14, 0x00, 0x52, 0x50, 0x01, 0x45, 0x30, 0x0A, 0x29, 0x08, 0x28, 0xA0, 0x61, 0x45, 0x02, 0x16, 0x8A, 0x06, 0x28, 0xA2, 0x81, 0x05, 0x2D, 0x00, 0x14, 0x52, 0x01, 0x68, 0xA6, 0x02, 0xD1, 0x8A, 0x40, 0x14, 0xB8, 0xA0, 0x03, 0x14, 0x62, 0x98, 0x09, 0x8A, 0x31, 0x49, 0x80, 0x52, 0x50, 0x01, 0x45, 0x00, 0x25, 0x14, 0x00, 0x94, 0x62, 0x98, 0x05, 0x14, 0x00, 0x52, 0x50, 0x01, 0x45, 0x00, 0x25, 0x14, 0x0C, 0x28, 0xA0, 0x05, 0xA2, 0x80, 0x0A, 0x28, 0x00, 0xA2, 0x81, 0x0B, 0x45, 0x00, 0x2D, 0x14, 0x00, 0xB4, 0x52, 0x01, 0x68, 0xC5, 0x00, 0x2D, 0x2E, 0x28, 0x10, 0x62, 0x97, 0x14, 0x00, 0x62, 0x93, 0x14, 0x00, 0x62, 0x8C, 0x50, 0x02, 0x62, 0x8C, 0x50, 0x02, 0x51, 0x40, 0xC4, 0xA2, 0x80, 0x12, 0x8A, 0x00, 0x29, 0x28, 0x00, 0xA2, 0x98, 0x09, 0x45, 0x00, 0x14, 0x94, 0x00, 0xB4, 0x50, 0x30, 0xA2, 0x80, 0x0A, 0x28, 0x00, 0xA5, 0xA0, 0x40, 0x29, 0x69, 0x00, 0x52, 0xE2, 0x80, 0x0A, 0x5A, 0x00, 0x51, 0x4B, 0x8A, 0x04, 0x2E, 0x29, 0x71, 0x40, 0x06, 0x29, 0x40, 0xA0, 0x03, 0x14, 0x62, 0x80, 0x13, 0x14, 0x62, 0x90, 0x09, 0x8A, 0x31, 0x4C, 0x04, 0xA4, 0xC5, 0x00, 0x25, 0x25, 0x03, 0x0A, 0x28, 0x01, 0x28, 0xA0, 0x04, 0xA2, 0x80, 0x0A, 0x4A, 0x00, 0x28, 0xA6, 0x31, 0x28, 0xA0, 0x05, 0xA2, 0x80, 0x0A, 0x28, 0x10, 0xB4, 0x50, 0x02, 0xD1, 0x48, 0x05, 0xA5, 0x14, 0x00, 0x52, 0x81, 0x40, 0x0A, 0x05, 0x38, 0x0A, 0x04, 0x38, 0x0F, 0x6A, 0x76, 0xDA, 0x40, 0x1B, 0x4D, 0x18, 0xA1, 0x31, 0x5C, 0x31, 0x46, 0x28, 0x01, 0x31, 0x49, 0x8A, 0x00, 0x4C, 0x51, 0x8A, 0x06, 0x34, 0x8A, 0x08, 0xA0, 0x04, 0xC5, 0x36, 0x98, 0x06, 0x28, 0xA0, 0x62, 0x52, 0x50, 0x01, 0x49, 0x40, 0x05, 0x14, 0xC0, 0x4A, 0x28, 0x18, 0x51, 0x40, 0x82, 0x8A, 0x06, 0x14, 0xB4, 0x80, 0x28, 0xA6, 0x21, 0x45, 0x2D, 0x20, 0x0A, 0x5A, 0x00, 0x5A, 0x70, 0x14, 0x00, 0xE0, 0x29, 0xCA, 0xB9, 0x34, 0x08, 0xDA, 0xF0, 0xEE, 0x9B, 0x15, 0xF5, 0xCC, 0x86, 0xE1, 0x77, 0x45, 0x1A, 0xF2, 0x01, 0x23, 0x93, 0xD3, 0xA7, 0xE3, 0x5A, 0x57, 0x3E, 0x17, 0x8C, 0xAE, 0x6D, 0x67, 0x60, 0xDF, 0xDD, 0x90, 0x64, 0x1F, 0xC4, 0x74, 0xFD, 0x6A, 0x56, 0xE0, 0x95, 0xCC, 0xBB, 0x8D, 0x12, 0xFE, 0xDC, 0x65, 0xA1, 0xDE, 0x3D, 0x63, 0xF9, 0xBF, 0xFA, 0xFF, 0x00, 0xA5, 0x50, 0x31, 0xE0, 0x90, 0x46, 0x08, 0xE0, 0xFB, 0x53, 0xB5, 0x88, 0x69, 0x8D, 0x31, 0xFA, 0x52, 0x15, 0xA4, 0x17, 0x1B, 0xB6, 0x90, 0x8A, 0x00, 0x42, 0x29, 0xA4, 0x53, 0x28, 0x4C, 0x52, 0x62, 0x81, 0x8D, 0x34, 0x98, 0xA1, 0x00, 0x98, 0xA0, 0xD3, 0x18, 0x94, 0x94, 0x00, 0x94, 0x50, 0x02, 0x51, 0x40, 0x09, 0x45, 0x30, 0x0A, 0x28, 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0x80, 0xA7, 0x0A, 0x42, 0x1E, 0xA2, 0xAD, 0x5B, 0xC4, 0xD2, 0x49, 0x1C, 0x6B, 0x8D, 0xCE, 0xC1, 0x47, 0xD4, 0x9C, 0x52, 0x11, 0xE8, 0x11, 0xA2, 0xC7, 0x1A, 0xA2, 0x0C, 0x2A, 0x8C, 0x01, 0xE8, 0x29, 0xD5, 0x69, 0x59, 0x58, 0xD0, 0x28, 0xA6, 0x01, 0x45, 0x00, 0x45, 0x3D, 0xBC, 0x37, 0x0A, 0x16, 0x68, 0x96, 0x40, 0x3A, 0x6E, 0x1D, 0x3E, 0x9E, 0x95, 0x9B, 0x71, 0xA0, 0x5B, 0x48, 0x3F, 0x72, 0xCD, 0x11, 0xF7, 0xF9, 0x87, 0xF8, 0xFE, 0xB4, 0x09, 0xA4, 0xF7, 0x32, 0x6E, 0x34, 0x3B, 0xC8, 0xB3, 0x88, 0xC4, 0x8A, 0x39, 0xCA, 0x1C, 0xFE, 0x9D, 0x6B, 0x32, 0x48, 0x19, 0x18, 0xAB, 0x29, 0x0C, 0x3A, 0x8E, 0xE2, 0xA3, 0x95, 0x98, 0xB8, 0xB4, 0x42, 0xC9, 0x51, 0xB2, 0xD4, 0x8D, 0x0C, 0x23, 0x9A, 0x6E, 0x29, 0x94, 0x21, 0x14, 0xD2, 0x29, 0x8C, 0x4A, 0x4A, 0x60, 0x25, 0x25, 0x05, 0x09, 0x45, 0x02, 0x12, 0x8A, 0x60, 0x25, 0x14, 0x0C, 0x29, 0x68, 0x00, 0xA0, 0x50, 0x02, 0xD0, 0x28, 0x10, 0xB4, 0xB4, 0x80, 0x5A, 0x70, 0xEB, 0x40, 0x87, 0x0A, 0x7A, 0x8A, 0x41, 0x72, 0x58, 0xD7, 0x26, 0xB7, 0xBC, 0x35, 0x6D, 0xE6, 0xDE, 0x99,
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0x6E, 0x0F, 0x39, 0xDE, 0x47, 0xE8, 0x3F, 0xAD, 0x00, 0x73, 0x0E, 0x39, 0xA8, 0x88, 0xAC, 0xD1, 0x88, 0xD2, 0x29, 0xA6, 0x9D, 0xCA, 0x1B, 0x49, 0x40, 0xC4, 0xA4, 0xA6, 0x31, 0x29, 0x28, 0x01, 0x28, 0xA6, 0x02, 0x51, 0x40, 0xC2, 0x96, 0x80, 0x0A, 0x5A, 0x00, 0x29, 0x69, 0x08, 0x29, 0xC2, 0x80, 0x14, 0x53, 0x85, 0x21, 0x0F, 0x15, 0x22, 0x8A, 0x04, 0x5A, 0x81, 0x0B, 0x15, 0x55, 0x19, 0x2C, 0x70, 0x07, 0xA9, 0xED, 0x5D, 0xEC, 0x31, 0x88, 0xA2, 0x48, 0xD7, 0xA2, 0x80, 0x05, 0x43, 0x7A, 0x13, 0x6B, 0x8F, 0xA2, 0xB6, 0x36, 0x0A, 0x28, 0x00, 0xA2, 0x80, 0x0A, 0x28, 0x00, 0xA2, 0x80, 0x0A, 0xE3, 0x75, 0xA9, 0x8C, 0xDA, 0x8C, 0xCC, 0x4F, 0x0A, 0x76, 0xAF, 0xB0, 0x1C, 0x7F, 0x3C, 0x9F, 0xC6, 0x80, 0x32, 0x9A, 0xA3, 0x35, 0x99, 0x88, 0xD3, 0x4C, 0xA6, 0x50, 0xD2, 0x29, 0x0D, 0x31, 0x89, 0x49, 0x40, 0xC4, 0xA4, 0xA0, 0x04, 0xA2, 0x98, 0x09, 0x45, 0x03, 0x0A, 0x5A, 0x00, 0x28, 0xA0, 0x05, 0x14, 0xB4, 0x08, 0x51, 0x4B, 0x48, 0x07, 0x0A, 0x70, 0xA4, 0x21, 0xEB, 0x52, 0xA0, 0xC9, 0xA0, 0x46, 0xD6, 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 };

void io_mux_init(void)
{
    fpioa_set_function(4, FUNC_UART1_RX + UART_NUM * 2);
    fpioa_set_function(5, FUNC_UART1_TX + UART_NUM * 2);
}
int main()
{
    // printf("cpu:%d\r\n", sysctl_clock_get_freq(SYSCTL_CLOCK_CPU));
    // sleep(2);
    io_mux_init();
    plic_init();
    sysctl_enable_irq();
    dmac_init();

    uart_init(UART_NUM);
    uart_configure(UART_NUM, 2000000, 8, UART_STOP_1, UART_PARITY_NONE);

    uint8_t tmp;
    while(1)
    {
        int ret =  uart_receive_data(UART_NUM, &tmp, 1);
        if( ret && tmp == 0x55)
            uart_send_data_dma(UART_NUM, 4, jpeg, sizeof(jpeg));
    }
}

python receive test code

import serial
import time

com = serial.Serial()
com.baudrate = 2000000
com.port = "/dev/ttyUSB4"
com.bytesize = 8
com.parity = serial.PARITY_NONE
com.stopbits = 1
com.timeout = 0.1
com.rts = True
com.dtr = True
com.open()

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 ]

jpeg = []
jpeg_start_flag = False
count = 0
com.write(b'\x55')
while True:
    tmp = com.read(1)
    count += 1
    # print(count, tmp)
    if not tmp or (len(tmp)==0):
        continue
    if not jpeg_start_flag:
        if tmp==b'\xFF':
            tmp = com.read(1)
            if tmp==b'\xD8':
                print("jpeg start")
                jpeg_start_flag = True
                jpeg.append(0xFF)
                jpeg.append(0xD8)
    else:
        jpeg.append(int.from_bytes(tmp, byteorder="little"))
        if jpeg[-2:] == test_jpeg[-2:]:
            print("jpeg end")
            if(jpeg == test_jpeg):
                print("receive ok")
            else:
                print("recieve error")
            jpeg_start_flag = False
            jpeg = []
            count = 0
            com.write(b'\x55')
zzxcanaan commented 5 years ago

KD233？

Neutree commented 5 years ago

Board: sipeed maix bit or dock, the open-ec firmware on the sipeed maix go board have bug when baud rate too high, so ignore it! when change the CPU clock and UART clock to correct value, it can send data correctly, so maybe it's not bug

Neutree commented 5 years ago

for this test code, when change baudrate to 1.5M, it works correctly, but 921600 not, maybe change the CPU frequency can do.

zzxcanaan commented 5 years ago

Thanks, I will try it.

chegewara commented 5 years ago

I have similar/the same issue with maixduino board. UART connection between k210 and esp32 and very simple example:

#include <stdio.h>
#include <string.h>
#include "gpio.h"
#include "fpioa.h"
#include "uart.h"
#include "sleep.h"

int main(void)
{
    fpioa_set_function(7, FUNC_UART3_RX);
    fpioa_set_function(6, FUNC_UART3_TX);

    uart_init ( UART_DEVICE_3 );
    uart_configure(UART_DEVICE_3, 500000, UART_BITWIDTH_8BIT, UART_STOP_1, UART_PARITY_NONE);
    char recv;

    while(1){
        while ( uart_receive_data ( UART_DEVICE_3 , &recv , 1))
        {
            printf ( "%c" , recv );
            uart_send_data ( UART_DEVICE_3 , &recv , 1);
        }
        msleep(1);
    }
}

Sometimes data sent from esp32 are send back(sometimes corrupted), but are not logged on k210 console. When i send \r\n then k210 console prints old data, just like \r\n was missing in last message to printf. With baudrate 115200 is much better, so maybe its esp32 or arduino issue.

EDIT with 115200 all data are received by k210, not all data are send back or not all data are received by esp32 (not always, but still often)