avr/bootloader
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Fix receiveByte timeout and add global timeout

Browse Source
This commit is contained in:
BlackMark 2020-04-12 11:47:11 +02:00
parent 6f9d8bae42
commit 8979066420
1 changed files with 37 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

50
stk500v2/main.cpp
View File

@ -2,6 +2,8 @@
#include "uart/uart.hpp"
#include <math.h>
#include <avr/boot.h>
#include <avr/interrupt.h>
#include <avr/io.h>
@ -9,7 +11,10 @@
#include "command.hpp"
using uart_interface = uart::Hardware0<uart::Config<115200>, uart::Driven::BLOCKING>;
static constexpr auto TIMEOUT = 5000;
static constexpr auto BAUD_RATE = 115200;
using uart_interface = uart::Hardware0<uart::Config<BAUD_RATE>, uart::Driven::BLOCKING>;
uart::Uart<uart_interface> serial;
struct Message {
@ -21,11 +26,26 @@ struct Message {
uint8_t checksum;
};
static inline bool receiveByte(uint8_t &data, uint32_t timeout = 100000)
static inline bool receiveByte(uint8_t &data, uint16_t &timeout)
{
for (uint32_t i = 0; i < timeout; ++i) {
if (serial.rxByte(data))
constexpr auto MICROSECOND = 1000.0 * 1000;
constexpr auto SYMBOL_SIZE = 9;
constexpr auto BYTE_DELAY_US = (SYMBOL_SIZE * MICROSECOND) / BAUD_RATE;
constexpr auto NUM_MS_DELAY_STEPS = static_cast<uint16_t>(round(1000 / BYTE_DELAY_US));
uint16_t msDelay = NUM_MS_DELAY_STEPS;
while (timeout) {
if (serial.rxByte(data)) {
timeout = TIMEOUT;
return true;
}
_delay_us(BYTE_DELAY_US);
if (--msDelay == 0) {
msDelay = NUM_MS_DELAY_STEPS;
--timeout;
}
}
return false;
@ -42,23 +62,23 @@ static inline uint8_t calcChecksum(const Message &msg)
return checksum;
}
static inline bool receiveMessage(Message &msg)
static inline bool receiveMessage(Message &msg, uint16_t &timeout)
{
if (!receiveByte(msg.start) || msg.start != MESSAGE_START)
if (!receiveByte(msg.start, timeout) || msg.start != MESSAGE_START)
return false;
if (!receiveByte(msg.number))
if (!receiveByte(msg.number, timeout))
return false;
if (!receiveByte(*(reinterpret_cast<uint8_t *>(&msg.size) + 1)))
if (!receiveByte(*(reinterpret_cast<uint8_t *>(&msg.size) + 1), timeout))
return false;
if (!receiveByte(*reinterpret_cast<uint8_t *>(&msg.size)) || msg.size > sizeof(msg.body))
if (!receiveByte(*reinterpret_cast<uint8_t *>(&msg.size), timeout) || msg.size > sizeof(msg.body))
return false;
if (!receiveByte(msg.token) || msg.token != TOKEN)
if (!receiveByte(msg.token, timeout) || msg.token != TOKEN)
return false;
for (uint16_t i = 0; i < msg.size; ++i) {
if (!receiveByte(msg.body[i]))
if (!receiveByte(msg.body[i], timeout))
return false;
}
if (!receiveByte(msg.checksum) || msg.checksum != calcChecksum(msg))
if (!receiveByte(msg.checksum, timeout) || msg.checksum != calcChecksum(msg))
return false;
return true;
@ -551,11 +571,15 @@ int main()
Message msg;
uint32_t addr = 0x0000;
ChipEraseState chipEraseFlag = ChipEraseState::NONE;
uint16_t timeout = TIMEOUT;
while (true) {
if (receiveMessage(msg)) {
if (receiveMessage(msg, timeout)) {
handleMessage(msg, addr, chipEraseFlag);
}
if (timeout == 0)
timeout = TIMEOUT;
}
return 0;