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Convert some local macros to inline functions

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This commit is contained in:
Allen Hill
2026-05-04 12:30:45 -07:00
parent 628ec2de5f
commit 6adffe1619
2 changed files with 57 additions and 46 deletions
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src/avclandrv.c
+57 -39
View File
@@ -103,21 +103,6 @@
// F_CPU defined in timing.h and potentially needed by avr-libc (e.g. delay.h)
#include "timing.h"
// clang-format off
#define AVC_SET_LOGICAL_1() \
__asm__ __volatile__( \
"cbi %[vporta_out], 4; \n\t" \
"sbi %[vportc_out], 0; \n\t" \
::[vporta_out] "I"(_SFR_IO_ADDR(VPORTA_OUT)), \
[vportc_out] "I"(_SFR_IO_ADDR(VPORTC_OUT)));
#define AVC_SET_LOGICAL_0() \
__asm__ __volatile__( \
"sbi %[vporta_out], 4; \n\t" \
"cbi %[vportc_out], 0; \n\t" \
::[vporta_out] "I"(_SFR_IO_ADDR(VPORTA_OUT)), \
[vportc_out] "I"(_SFR_IO_ADDR(VPORTC_OUT)));
// clang-format on
// Name difference between avr-libc and Microchip pack
#if defined(EVSYS_ASYNCCH00_bm)
#define EVSYS_ASYNCCH0_0_bm EVSYS_ASYNCCH00_bm
@@ -178,6 +163,36 @@ uint8_t cdstatus_resp[] = {dev_CD_CHANGER,
uint8_t AVCLAN_handleframe(const AVCLAN_frame_t *frame);
void AVCLAN_updateCDStatus();
/* Disable serial and periodic interrupts during AVCLAN reads.
Not using cli() because AVCLAN reads depend on other interrupts. */
static inline void stopEvent() {
RTC.PITINTCTRL = 0x00; // PITINTCTRL allows resetting with full zero write.
cbi(USART0.CTRLA, USART_RXCIE_bp);
}
// Re-enable serial and periodic interrupts.
static inline void startEvent() {
sbi(RTC.PITINTCTRL, RTC_PI_bp); // Reenable PIT interrupt
sbi(USART0.CTRLA, USART_RXCIE_bp);
}
// clang-format off
static inline void AVCLAN_setBusIdle() {
__asm__ __volatile__(
"cbi %[vporta_out], 4; \n\t"
"sbi %[vportc_out], 0; \n\t"
::[vporta_out] "I"(_SFR_IO_ADDR(VPORTA_OUT)),
[vportc_out] "I"(_SFR_IO_ADDR(VPORTC_OUT)));
}
static inline void AVCLAN_setBusDriven() {
__asm__ __volatile__(
"sbi %[vporta_out], 4; \n\t"
"cbi %[vportc_out], 0; \n\t"
::[vporta_out] "I"(_SFR_IO_ADDR(VPORTA_OUT)),
[vportc_out] "I"(_SFR_IO_ADDR(VPORTC_OUT)));
}
// clang-format on
void AVCLAN_init() {
// Pull-ups are disabled by default
// Set pin 6 and 7 as input
@@ -214,8 +229,7 @@ void AVCLAN_init() {
loop_until_bit_is_clear(RTC_PITSTATUS, RTC_CTRLBUSY_bp);
RTC.PITCTRLA = RTC_PERIOD_CYC32768_gc | RTC_PITEN_bm;
// Set bus output pins to idle
AVC_SET_LOGICAL_1();
AVCLAN_setBusIdle();
AVCLAN_muteDevice(0); // unmute AVCLAN bus TX
@@ -301,9 +315,9 @@ static inline uint8_t AVCLAN_ismuted() {
void set_AVC_logic_for(uint8_t val, uint16_t period) {
TCB1.CNT = 0;
if (val) {
AVC_SET_LOGICAL_1();
AVCLAN_setBusIdle(); // idle bus is logical 1
} else {
AVC_SET_LOGICAL_0();
AVCLAN_setBusDriven();
}
while (TCB1.CNT <= period) {};
@@ -340,11 +354,15 @@ void AVCLAN_sendbit_ACK() {
set_AVC_logic_for(1, AVCLAN_BIT0_LOGIC_1);
}
// Returns true if an ACK bit was sent by the peripheral
/* Returns true if the peripheral sent an ACK bit.
An ACK bit is a cooperative bit, where the sender starts (drives the bus) a
sync period, and allows the receiver to drive the bus (or not) to finish a "1"
bit.
*/
uint8_t AVCLAN_readbit_ACK() {
TCB1.CNT = 0;
set_AVC_logic_for(0, AVCLAN_BIT1_LOGIC_0);
AVC_SET_LOGICAL_1(); // Stop driving bus
AVCLAN_setBusIdle(); // Stop driving bus
while (1) {
if (!BUS_IS_IDLE && (TCB1.CNT > AVCLAN_READBIT_THRESHOLD))
@@ -512,7 +530,7 @@ uint8_t AVCLAN_readbyte(uint8_t *byte) {
}
uint8_t AVCLAN_readframe() {
STOPEvent; // disable timer1 interrupt
stopEvent(); // disable timer1 interrupt
uint8_t data[MAXMSGLEN];
AVCLAN_frame_t frame = {
@@ -525,14 +543,14 @@ uint8_t AVCLAN_readframe() {
TCB1.CNT = 0;
while (!BUS_IS_IDLE) {
if (TCB1.CNT > (uint16_t)AVCLAN_STARTBIT_LOGIC_0 * 1.2) {
STARTEvent;
startEvent();
return 0;
}
}
uint16_t startbitlen = TCB1.CNT;
if (startbitlen < (uint16_t)(AVCLAN_STARTBIT_LOGIC_0 * 0.8)) {
RS232_Print("ERR: 1.\n");
STARTEvent;
startEvent();
return 0;
}
// Otherwise that was a start bit
@@ -552,7 +570,7 @@ uint8_t AVCLAN_readframe() {
RS232_PrintHex4(tmp & 1);
}
RS232_Print(".\n");
STARTEvent;
startEvent();
return 0;
}
@@ -569,7 +587,7 @@ uint8_t AVCLAN_readframe() {
RS232_PrintHex4(tmp & 1);
}
RS232_Print(".\n");
STARTEvent;
startEvent();
return 0;
}
@@ -594,7 +612,7 @@ uint8_t AVCLAN_readframe() {
RS232_PrintHex4(tmp & 1);
}
RS232_Print(".\n");
STARTEvent;
startEvent();
return 0;
} else if (shouldACK) {
AVCLAN_sendbit_ACK();
@@ -615,7 +633,7 @@ uint8_t AVCLAN_readframe() {
RS232_PrintHex4(tmp & 1);
}
RS232_Print(".\n");
STARTEvent;
startEvent();
return 0;
} else if (shouldACK) {
AVCLAN_sendbit_ACK();
@@ -627,7 +645,7 @@ uint8_t AVCLAN_readframe() {
RS232_Print("Bad length; got 0x");
RS232_PrintHex4(frame.length);
RS232_Print(".\n");
STARTEvent;
startEvent();
return 0;
}
@@ -645,7 +663,7 @@ uint8_t AVCLAN_readframe() {
RS232_PrintHex4(tmp & 1);
}
RS232_Print(".\n");
STARTEvent;
startEvent();
return 0;
} else if (shouldACK) {
AVCLAN_sendbit_ACK();
@@ -654,7 +672,7 @@ uint8_t AVCLAN_readframe() {
}
}
STARTEvent;
startEvent();
if (printAllFrames)
AVCLAN_printframe(&frame, printBinary);
@@ -670,7 +688,7 @@ uint8_t AVCLAN_sendframe(const AVCLAN_frame_t *frame) {
if (AVCLAN_ismuted())
return 1;
STOPEvent;
stopEvent();
uint8_t parity = 0;
@@ -712,7 +730,7 @@ uint8_t AVCLAN_sendframe(const AVCLAN_frame_t *frame) {
AVCLAN_sendbit_parity(parity);
if (frame->broadcast && !AVCLAN_readbit_ACK()) {
STARTEvent;
startEvent();
RS232_Print("Error NAK: Addresses\n");
return 1;
}
@@ -721,7 +739,7 @@ uint8_t AVCLAN_sendframe(const AVCLAN_frame_t *frame) {
AVCLAN_sendbit_parity(parity);
if (frame->broadcast && !AVCLAN_readbit_ACK()) {
STARTEvent;
startEvent();
RS232_Print("Error NAK: Control\n");
return 2;
}
@@ -730,7 +748,7 @@ uint8_t AVCLAN_sendframe(const AVCLAN_frame_t *frame) {
AVCLAN_sendbit_parity(parity);
if (frame->broadcast && !AVCLAN_readbit_ACK()) {
STARTEvent;
startEvent();
RS232_Print("Error NAK: Message length\n");
return 3;
}
@@ -742,7 +760,7 @@ uint8_t AVCLAN_sendframe(const AVCLAN_frame_t *frame) {
// necessary (i.e. This deviates from the previous broadcast specific
// function that sent an extra `1` bit after each byte/parity)
if (frame->broadcast && !AVCLAN_readbit_ACK()) {
STARTEvent;
startEvent();
RS232_Print("Error NAK (Data: ");
RS232_PrintHex8(i);
RS232_Print(")\n");
@@ -753,7 +771,7 @@ uint8_t AVCLAN_sendframe(const AVCLAN_frame_t *frame) {
}
// back to read mode
STARTEvent;
startEvent();
if (printAllFrames)
AVCLAN_printframe(frame, printBinary);
@@ -1090,7 +1108,7 @@ uint16_t pulses[100];
uint16_t periods[100];
void AVCLan_Measure() {
STOPEvent;
stopEvent();
uint8_t tmp = 0;
@@ -1120,6 +1138,6 @@ void AVCLan_Measure() {
}
RS232_Print("\nDone.\n");
STARTEvent;
startEvent();
}
#endif
src/avclandrv.h
-7
View File
@@ -31,13 +31,6 @@
#define sbi(port, bit) (port) |= (1 << (bit)) // Set bit (i.e. to 1)
#define cbi(port, bit) (port) &= ~(1 << (bit)) // Clear bit (i.e. set bit to 0)
#define STOPEvent \
cbi(RTC.PITINTCTRL, RTC_PI_bp); \
cbi(USART0.CTRLA, USART_RXCIE_bp);
#define STARTEvent \
sbi(RTC.PITINTCTRL, RTC_PI_bp); \
sbi(USART0.CTRLA, USART_RXCIE_bp);
#define MAXMSGLEN 32
#define DEVICE_ADDR 0x360 // CD Changer address