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Code Issues Releases Wiki Activity

Improve/expand C phy docs

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This commit is contained in:
Allen Hill
2026-07-08 13:51:38 -07:00
parent 2ed6066609
commit b194a6df2c
4 changed files with 48 additions and 37 deletions
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src/avclan/target/avr-attiny3216/phy_avr.c
+9 -9
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@@ -237,7 +237,7 @@ ISR(TCB0_INT_vect) {
}
// Read `len` bits on the AVCLAN bus; returns the even parity
uint8_t phy_read_bits_u8(uint8_t *bits, uint8_t len) {
Bit phy_read_bits_u8(uint8_t *bits, uint8_t len) {
uint8_t parity;
ATOMIC_BLOCK(ATOMIC_RESTORESTATE) {
READING_BYTE = 0;
@@ -260,11 +260,11 @@ uint8_t phy_read_bits_u8(uint8_t *bits, uint8_t len) {
parity = READING_PARITY;
}
return (parity & 1);
return (Bit)(parity & 1);
}
// Read `len` bits on the AVCLAN bus; returns the even parity
uint8_t phy_read_bits_u16(uint16_t *bits, int8_t len) {
Bit phy_read_bits_u16(uint16_t *bits, int8_t len) {
uint8_t parity = 0;
if (len > 8) {
uint8_t over = len - 8;
@@ -273,11 +273,11 @@ uint8_t phy_read_bits_u16(uint16_t *bits, int8_t len) {
}
parity += phy_read_bits_u8((uint8_t *)bits + 0, len);
return (parity & 1);
return (Bit)(parity & 1);
}
// Read a byte on the AVCLAN bus
uint8_t phy_read_byte(uint8_t *byte) {
Bit phy_read_byte(uint8_t *byte) {
uint8_t parity;
ATOMIC_BLOCK(ATOMIC_RESTORESTATE) {
READING_BYTE = 0;
@@ -300,7 +300,7 @@ uint8_t phy_read_byte(uint8_t *byte) {
parity = READING_PARITY;
}
return (parity & 1);
return (Bit)(parity & 1);
}
void phy_init() {
@@ -384,7 +384,7 @@ Read phy_read_startbit() {
// Acquire the bus and emit a start bit. Returns false if another device is
// already driving the bus (we can't yet do proper CSMA/CD).
bool phy_send_startbit() {
Send phy_send_startbit() {
// wait for free line
TCB1.CNT = 0;
while (BUS_IS_IDLE) {
@@ -407,10 +407,10 @@ bool phy_send_startbit() {
// if (TCB1.CNT <= (uint16_t)(AVCLAN_STARTBIT_LOGIC_0 * 0.8))
// return false; // Shouldn't be possible
// set_AVC_logic_for(1, AVCLAN_STARTBIT_LOGIC_1); // wait for end of start
return false;
return BUSY;
}
phy_send_bit(bit_start);
return true;
return (Send)0;
}
/* Disable non-read related interrupts (USART RX, RTC status tick, mic timer)