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[PCF7930] refactor move code

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move "remapping" of dataframes to the actual send function,
where the timer is located
This commit is contained in:
tinooo 2025-03-04 16:09:21 +01:00 • committed by Tino
parent 8723037e68
commit d3a87ead61
2 changed files with 16 additions and 17 deletions
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31
armsrc/pcf7931.c
View file

@ -420,7 +420,6 @@ static void RealWritePCF7931(
uint32_t tab[1024] = {0}; // data times frame
uint32_t u = 0;
uint8_t parity = 0;
bool comp = 0;
//BUILD OF THE DATA FRAME
//alimentation of the tag (time for initializing)
@ -485,20 +484,6 @@ static void RealWritePCF7931(
// Not sure why 335*T0, but should not matter. Since programming should be finished at that point
AddPatternPCF7931((640 + 335)* T0_PCF, 0, 0, tab);
//conversion of the scale time
for (u = 0; u < 500; ++u)
tab[u] = (tab[u] * 3) / 2;
//compensation of the counter reload
while (!comp) {
comp = 1;
for (u = 0; tab[u] != 0; ++u)
if (tab[u] > 0xFFFF) {
tab[u] -= 0xFFFF;
comp = 0;
}
}
SendCmdPCF7931(tab, ledcontrol);
}
@ -534,7 +519,7 @@ void WritePCF7931(
* @param tab : array of the data frame
*/
void SendCmdPCF7931(const uint32_t *tab, bool ledcontrol) {
void SendCmdPCF7931(uint32_t *tab, bool ledcontrol) {
uint16_t u = 0, tempo = 0;
if (g_dbglevel >= DBG_INFO) {
@ -546,6 +531,20 @@ void SendCmdPCF7931(const uint32_t *tab, bool ledcontrol) {
FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_PASSTHRU);
if (ledcontrol) LED_A_ON();
// rescale the values to match the time of the timer below.
for (u = 0; u < 500; ++u) {
tab[u] = (tab[u] * 3) / 2;
}
// compensation for the counter overflow
// only one overflow should be possible.
for (u = 0; tab[u] != 0; ++u)
if (tab[u] > 0xFFFF) {
tab[u] -= 0xFFFF;
break;
}
// steal this pin from the SSP and use it to control the modulation
AT91C_BASE_PIOA->PIO_PER = GPIO_SSC_DOUT;

2
armsrc/pcf7931.h
View file

@ -28,7 +28,7 @@ size_t DemodPCF7931(uint8_t **outBlocks, bool ledcontrol);
bool IsBlock0PCF7931(uint8_t *block);
bool IsBlock1PCF7931(const uint8_t *block);
void ReadPCF7931(bool ledcontrol);
void SendCmdPCF7931(const uint32_t *tab, bool ledcontrol);
void SendCmdPCF7931(uint32_t *tab, bool ledcontrol);
bool AddBytePCF7931(uint8_t byte, uint32_t *tab, int8_t offsetPulseWidth, int8_t offsetPulsePosition);
bool AddBitPCF7931(bool b, uint32_t *tab, int8_t offsetPulseWidth, int8_t offsetPulsePosition);
bool AddPatternPCF7931(uint32_t a, uint32_t b, uint32_t c, uint32_t *tab);