mainscnt/mains-frequency-counter-rpi
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This commit is contained in:
Wolfgang Hottgenroth
2019-10-04 13:33:43 +02:00
parent a1b5070416
commit a61836c739
1 changed files with 10 additions and 9 deletions
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19
snippets/test1/test1.c
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@ -60,11 +60,8 @@ const uint8_t MDR1_F_BW = 0b01000000;
const uint8_t MDR1_F_CY = 0b10000000;
volatile uint32_t ec = 0;
void isr() {
ec++;
}
volatile uint32_t savedCounter = 0;
uint32_t lastSavedCounter = 0;
void writeCmd(uint8_t c) {
uint8_t buf[1];
@ -94,6 +91,10 @@ uint32_t read32(uint8_t c) {
return r;
}
void isr() {
savedCounter = read32(CMD_RD | REG_OTR);
}
void init() {
wiringPiSetupGpio();
@ -109,6 +110,7 @@ void init() {
void initCounter() {
writeCmd(CMD_CLR | REG_STR);
writeCmd(CMD_CLR | REG_CNTR);
writeCmdData(CMD_WR | REG_MDR0, MDR0_ILO);
}
int main (void) {
@ -116,10 +118,9 @@ int main (void) {
initCounter();
while (1) {
uint8_t str = read8(CMD_RD | REG_STR);
uint32_t cntr = read32(CMD_RD | REG_CNTR);
printf("%02x %d %d\n", str, ec, cntr);
uint32_t diff = savedCounter - lastSavedCounter;
lastSavedCounter = savedCounter;
printf("%d\n", diff);
sleep(1);
}