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independent programmer

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This commit is contained in:
Alessandro Mauri 2026-04-05 20:08:18 +02:00
parent 03bf92f505
commit 821380d21c
3 changed files with 56 additions and 86 deletions
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6
fw/programmer/src/bitbang_rvswdio.h
View File

@ -188,7 +188,7 @@ static int InitializeSWDSWIO( struct SWIOState * state )
if( MCFReadReg32( state, DMSTATUS, &dmstatus ) != 0 || if( MCFReadReg32( state, DMSTATUS, &dmstatus ) != 0 ||
MCFReadReg32( state, DMCONTROL, &dmcontrol ) != 0 ) MCFReadReg32( state, DMCONTROL, &dmcontrol ) != 0 )
{ {
//BB_PRINTF_DEBUG( "Could not read from RVSWD connection\n" ); BB_PRINTF_DEBUG( "Could not read from RVSWD connection\n" );
state->opmode = 0; state->opmode = 0;
continue; continue;
} }
@ -198,7 +198,7 @@ static int InitializeSWDSWIO( struct SWIOState * state )
( ( dmstatus >> 8 ) & 0xf ) != 0x03 ) || ( ( dmstatus >> 8 ) & 0xf ) != 0x03 ) ||
dmcontrol != 1 ) dmcontrol != 1 )
{ {
//BB_PRINTF_DEBUG( "DMSTATUS invalid (Probably no RVSWD chip)\n" ); BB_PRINTF_DEBUG( "DMSTATUS invalid (Probably no RVSWD chip)\n" );
state->opmode = 0; state->opmode = 0;
continue; continue;
} }
@ -207,7 +207,7 @@ static int InitializeSWDSWIO( struct SWIOState * state )
BB_PRINTF_DEBUG( "Found RVSWD interface\n" ); BB_PRINTF_DEBUG( "Found RVSWD interface\n" );
return 0; return 0;
} }
//printf( "TIMEOUT\n" ); BB_PRINTF_DEBUG( "TIMEOUT\n" );
return -55; return -55;
} }

7
fw/programmer/src/bitbang_rvswdio_pico.h
View File

@ -37,7 +37,7 @@ static inline void ConfigureIOForRVSWD(void)
// Single wire input-output SDI (just SWDIO) // Single wire input-output SDI (just SWDIO)
static inline void ConfigureIOForRVSWIO(void) static inline void ConfigureIOForRVSWIO(void)
{ {
BB_PRINTF_DEBUG( "TODO: add support for SWIO\n" ); //BB_PRINTF_DEBUG( "TODO: add support for SWIO\n" );
} }
@ -84,7 +84,7 @@ static void MCFWriteReg32( struct SWIOState * state, uint8_t command, uint32_t v
{ {
// only supported mode is SWD // only supported mode is SWD
if (state->opmode != 2) { if (state->opmode != 2) {
BB_PRINTF_DEBUG( "TODO: add support for SWIO\n" ); //BB_PRINTF_DEBUG( "TODO: add support for SWIO\n" );
return; return;
} }
@ -138,7 +138,7 @@ static int MCFReadReg32( struct SWIOState * state, uint8_t command, uint32_t * v
{ {
// only supported mode is SWD // only supported mode is SWD
if (state->opmode != 2) { if (state->opmode != 2) {
BB_PRINTF_DEBUG( "TODO: add support for SWIO\n" ); //BB_PRINTF_DEBUG( "TODO: add support for SWIO\n" );
return -1; return -1;
} }
@ -192,5 +192,6 @@ static int MCFReadReg32( struct SWIOState * state, uint8_t command, uint32_t * v
read_end: read_end:
interrupts(); interrupts();
sleep_us(STOP_WAIT); sleep_us(STOP_WAIT);
BB_PRINTF_DEBUG("wrong parity: %d\n", parity_read);
return (parity == parity_read) ? 0 : -1; return (parity == parity_read) ? 0 : -1;
} }

63
fw/programmer/src/main.cpp
View File

@ -2,29 +2,16 @@
#include <Arduino.h> #include <Arduino.h>
#include <SerialUSB.h> #include <SerialUSB.h>
//#define BB_PRINTF_DEBUG(...) Serial.printf(__VA_ARGS__) #define BB_PRINTF_DEBUG(...) Serial.printf(__VA_ARGS__)
#define BB_PRINTF_DEBUG(...) //#define BB_PRINTF_DEBUG(...)
#include "bitbang_rvswdio.h" #include "bitbang_rvswdio.h"
#include "bitbang_rvswdio_pico.h" #include "bitbang_rvswdio_pico.h"
#define PROTOCOL_START '!'
#define PROTOCOL_ACK '+'
#define PROTOCOL_TEST '?'
#define PROTOCOL_POWER_ON 'p'
#define PROTOCOL_POWER_OFF 'P'
#define PROTOCOL_WRITE_REG 'w'
#define PROTOCOL_READ_REG 'r'
bool last_dtr = false;
SWIOState state = {.opmode = 2}; SWIOState state = {.opmode = 2};
void setup() { void setup() {
Serial.begin(115200); Serial.begin(115200);
Serial.setTimeout(100); Serial.setTimeout(100);
ConfigureIOForRVSWD();
// We do NOT block waiting for Serial here,
// we handle the connection dynamically in the loop.
} }
@ -35,46 +22,28 @@
void loop() { void loop() {
// Monitor DTR line to simulate Arduino Reset behavior
bool current_dtr = Serial.dtr();
if (current_dtr && !last_dtr) {
// minichlink just opened the port
ConfigureIOForRVSWD();
while (Serial.available() > 0) { Serial.read(); }
delay(100);
Serial.write(PROTOCOL_START); // Announce readiness
}
last_dtr = current_dtr;
if (Serial.available() > 0) { if (Serial.available() > 0) {
char cmd = Serial.read(); char cmd = Serial.read();
int ret = 0;
uint8_t reg; uint8_t reg;
uint32_t val;
switch (cmd) { switch (cmd) {
case PROTOCOL_TEST: case '!':
Serial.write(PROTOCOL_ACK); state = {};
ret = InitializeSWDSWIO(&state);
if (ret != 0) {
Serial.printf("error initializing SWD: %d\n", ret);
break; break;
case PROTOCOL_POWER_ON: }
// Not needed for rvswd ret = DetermineChipTypeAndSectorInfo(&state, NULL);
sleep_us(10); if (ret != 0) {
Serial.write(PROTOCOL_ACK); Serial.printf("failed to determine chip type: %d\n", ret);
break; break;
case PROTOCOL_POWER_OFF: }
// Not needed for rvswd Serial.printf("chip type is %x\n", state.target_chip_type);
sleep_us(10);
Serial.write(PROTOCOL_ACK);
break; break;
case PROTOCOL_WRITE_REG: default:
if (Serial.readBytes((char*)&reg, sizeof(uint8_t)) != 1) break; Serial.printf("unknown command '%c'\n", cmd);
if (Serial.readBytes((char*)&val, sizeof(uint32_t)) != 4) break;
MCFWriteReg32(&state, reg, val);
Serial.write(PROTOCOL_ACK);
break;
case PROTOCOL_READ_REG:
if (Serial.readBytes((char*)&reg, sizeof(uint8_t)) != 1) break;
MCFReadReg32(&state, reg, &val);
Serial.write((char*)&val, sizeof(uint32_t));
break; break;
} }
} }