[Core] Use a mutex guard for split shared memory (#16647)
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176ab14649
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6 changed files with 82 additions and 20 deletions
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@ -5,6 +5,7 @@
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#include "quantum.h"
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#include "serial.h"
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#include "wait.h"
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#include "synchronization_util.h"
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#include <hal.h>
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@ -86,7 +87,10 @@ static THD_FUNCTION(Thread1, arg) {
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chRegSetThreadName("blinker");
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while (true) {
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palWaitLineTimeout(SOFT_SERIAL_PIN, TIME_INFINITE);
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split_shared_memory_lock();
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interrupt_handler(NULL);
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split_shared_memory_unlock();
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}
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}
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@ -205,14 +209,9 @@ void interrupt_handler(void *arg) {
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chSysUnlockFromISR();
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}
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/////////
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// start transaction by initiator
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//
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// bool soft_serial_transaction(int sstd_index)
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//
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// this code is very time dependent, so we need to disable interrupts
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bool soft_serial_transaction(int sstd_index) {
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static inline bool initiate_transaction(uint8_t sstd_index) {
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if (sstd_index > NUM_TOTAL_TRANSACTIONS) return false;
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split_transaction_desc_t *trans = &split_transaction_table[sstd_index];
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// TODO: remove extra delay between transactions
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@ -239,8 +238,7 @@ bool soft_serial_transaction(int sstd_index) {
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return false;
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}
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// if the slave is present syncronize with it
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// if the slave is present synchronize with it
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uint8_t checksum = 0;
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// send data to the slave
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serial_write_byte(sstd_index); // first chunk is transaction id
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@ -286,3 +284,16 @@ bool soft_serial_transaction(int sstd_index) {
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chSysUnlock();
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return true;
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}
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/////////
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// start transaction by initiator
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//
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// bool soft_serial_transaction(int sstd_index)
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//
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// this code is very time dependent, so we need to disable interrupts
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bool soft_serial_transaction(int sstd_index) {
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split_shared_memory_lock();
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bool result = initiate_transaction((uint8_t)sstd_index);
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split_shared_memory_unlock();
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return result;
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}
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