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Firmware: add clock/timeout error detection

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Change-Id: Ice0286fb78fb13cd8eb803653b06988c66f7b44a
This commit is contained in:
David Banks 2019-11-09 12:35:15 +00:00
parent a601d1da97
commit 10b6c6a744
1 changed files with 33 additions and 1 deletions
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34
firmware/AtomBusMon.c
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@ -473,6 +473,14 @@ addr_t nextAddr = 0;
// Setting this to 0 will disable logging
long trace;
// An error flag
// Bit 0 indicates clock errors
// Bit 1 indicates memory access timeout errors
uint8_t error_flag = 0;
#define MASK_CLOCK_ERROR 1
#define MASK_TIMEOUT_ERROR 2
/********************************************************
* Simple string logger, as log0 is expensive
********************************************************/
@ -631,11 +639,19 @@ void readCmd(char *cmd) {
// Send a single hardware command
void hwCmd(cmd_t cmd, cmd_t param) {
uint8_t status = STATUS_DIN;
uint16_t timeout = 10000;
cmd |= param;
CTRL_PORT &= ~CMD_MASK;
CTRL_PORT ^= cmd | CMD_EDGE;
// Wait for the CMD_ACK bit to toggle
while (!((STATUS_DIN ^ status) & CMD_ACK_MASK));
while ((--timeout) && !((STATUS_DIN ^ status) & CMD_ACK_MASK));
if (timeout == 0) {
if (cmd & 0x10) {
error_flag |= MASK_TIMEOUT_ERROR;
} else {
error_flag |= MASK_CLOCK_ERROR;
}
}
}
// Read an 8-bit register via the Mux
@ -1627,6 +1643,18 @@ void dispatchCmd(char *cmd) {
logc('\n');
}
void check_errors() {
if (error_flag) {
logstr("*** ");
if (error_flag & MASK_CLOCK_ERROR) {
logstr("missing clock");
} else if (error_flag & MASK_TIMEOUT_ERROR) {
logstr("memory timeout");
}
logstr(" ***\n");
}
error_flag = 0;
}
#ifdef COMMAND_HISTORY
#define HISTORY_LENGTH 16
@ -1657,8 +1685,10 @@ int main(void) {
int8_t direction = 0;
initialize();
check_errors();
doCmdContinue(NULL);
while (1) {
check_errors();
// Returns:
// -1 to move back through the history buffer
// 0 to use the current command
@ -1717,8 +1747,10 @@ int main(void) {
int main(void) {
static char command[32];
initialize();
check_errors();
doCmdContinue(NULL);
while (1) {
check_errors();
readCmd(command);
dispatchCmd(command);
}