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[Core] Use a mutex guard for split shared memory (#16647)

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Stefan Kerkmann 2022-04-19 12:56:16 +02:00 • committed by GitHub
parent 176ab14649
commit 7712a286dc
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GPG key ID: 4AEE18F83AFDEB23
6 changed files with 82 additions and 20 deletions
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29
platforms/chibios/drivers/serial.c
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@ -5,6 +5,7 @@
#include "quantum.h"
#include "serial.h"
#include "wait.h"
#include "synchronization_util.h"
#include <hal.h>
@ -86,7 +87,10 @@ static THD_FUNCTION(Thread1, arg) {
chRegSetThreadName("blinker");
while (true) {
palWaitLineTimeout(SOFT_SERIAL_PIN, TIME_INFINITE);
split_shared_memory_lock();
interrupt_handler(NULL);
split_shared_memory_unlock();
}
}
@ -205,14 +209,9 @@ void interrupt_handler(void *arg) {
chSysUnlockFromISR();
}
/////////
// start transaction by initiator
//
// bool soft_serial_transaction(int sstd_index)
//
// this code is very time dependent, so we need to disable interrupts
bool soft_serial_transaction(int sstd_index) {
static inline bool initiate_transaction(uint8_t sstd_index) {
if (sstd_index > NUM_TOTAL_TRANSACTIONS) return false;
split_transaction_desc_t *trans = &split_transaction_table[sstd_index];
// TODO: remove extra delay between transactions
@ -239,8 +238,7 @@ bool soft_serial_transaction(int sstd_index) {
return false;
}
// if the slave is present syncronize with it
// if the slave is present synchronize with it
uint8_t checksum = 0;
// send data to the slave
serial_write_byte(sstd_index); // first chunk is transaction id
@ -286,3 +284,16 @@ bool soft_serial_transaction(int sstd_index) {
chSysUnlock();
return true;
}
/////////
// start transaction by initiator
//
// bool soft_serial_transaction(int sstd_index)
//
// this code is very time dependent, so we need to disable interrupts
bool soft_serial_transaction(int sstd_index) {
split_shared_memory_lock();
bool result = initiate_transaction((uint8_t)sstd_index);
split_shared_memory_unlock();
return result;
}