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added some helper functions

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iceman1001 2023-10-01 13:05:08 +02:00
commit bb5d61dca7
11 changed files with 111 additions and 28 deletions
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8
armsrc/i2c.c
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@ -39,11 +39,6 @@
#define I2C_ERROR "I2C_WaitAck Error"
// 8051 speaks with smart card.
// 1000*50*3.07 = 153.5ms
// 1 byte transfer == 1ms with max frame being 256 bytes
#define SIM_WAIT_DELAY 88000 // about 270ms delay // 109773 -- about 337.7ms delay
// Direct use the loop to delay. 6 instructions loop, Masterclock 48MHz,
// delay=1 is about 200kbps
// timer.
@ -58,9 +53,6 @@ static void __attribute__((optimize("O0"))) I2CSpinDelayClk(uint16_t delay) {
#define I2C_DELAY_2CLK I2CSpinDelayClk(2)
#define I2C_DELAY_XCLK(x) I2CSpinDelayClk((x))
// The SIM module v4 supports up to 384 bytes for the length.
#define ISO7816_MAX_FRAME 270
// try i2c bus recovery at 100kHz = 5us high, 5us low
void I2C_recovery(void) {