Refactor parallel comms a bit

This commit is contained in:
2025-10-01 23:24:59 +02:00
parent 3df5b28e4e
commit 2ba1546dec
8 changed files with 116 additions and 87 deletions

View File

@@ -1,6 +1,7 @@
#include "paracomm.h"
#include <stdlib.h>
#include <string.h>
#define kMosiIdleByte 0x00
#define kMosiStartByte 0x42
@@ -21,7 +22,6 @@ static uint8_t miso_recvbuf[256];
static uint8_t miso_size;
static uint8_t miso_received_nibbles;
static uint8_t miso_state;
static void (*miso_cb)(const uint8_t*, uint8_t);
static void swapbuffers() {
mosi_sendbuf = mosi_workbuf[mosi_workbuf_idx];
@@ -92,23 +92,19 @@ void paracomm_feed(uint8_t n) {
miso_received_nibbles += 1;
if (miso_received_nibbles == 2 * miso_size) {
if (miso_cb != 0) {
miso_cb(miso_recvbuf, miso_size);
}
miso_state = 0;
}
} break;
}
}
void paracomm_init(miso_cb_t cb) {
void paracomm_init() {
mosi_size = 0;
mosi_workbuf_idx = 0;
mosi_workbuf_size = 0;
mosi_state = 0;
miso_state = 0;
miso_cb = cb;
}
int paracomm_send(uint8_t b) {
@@ -122,3 +118,21 @@ int paracomm_send(uint8_t b) {
return 0;
}
uint8_t paracomm_recv(uint8_t* buf, uint8_t size) {
if (miso_state != 0) {
return 0;
}
if (size > miso_size) {
size = miso_size;
}
memcpy(buf, miso_recvbuf, size);
memcpy(miso_recvbuf, miso_recvbuf+size, miso_size - size);
miso_size -= size;
return size;
}
uint8_t paracomm_busy() {
return mosi_state != 0 || miso_state != 0;
}