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WIP: set clock polarity in software SPI

This commit is contained in:
Stefan Wiehler 2020-06-14 16:22:52 +02:00
parent 99b63a38a3
commit 6cb0c74e06
1 changed files with 17 additions and 0 deletions
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17
cppsrc/U8x8lib.cpp
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@ -392,6 +392,7 @@ extern "C" uint8_t u8x8_byte_arduino_4wire_sw_spi(u8x8_t *u8x8, uint8_t msg, uin
uint8_t i, b;
uint8_t *data;
uint8_t takeover_edge = u8x8_GetSPIClockPhase(u8x8);
uint8_t clock_polarity = u8x8_GetSPIClockPolarity(u8x8);
//uint8_t not_takeover_edge = 1 - takeover_edge;
/* the following static vars are recalculated in U8X8_MSG_BYTE_START_TRANSFER */
@ -431,6 +432,9 @@ extern "C" uint8_t u8x8_byte_arduino_4wire_sw_spi(u8x8_t *u8x8, uint8_t msg, uin
*arduino_clock_port |= arduino_clock_mask;
*arduino_clock_port &= arduino_clock_n_mask;
}
if (clock_polarity == 1) {
*arduino_clock_port |= arduino_clock_mask;
}
}
else
#endif
@ -446,6 +450,9 @@ extern "C" uint8_t u8x8_byte_arduino_4wire_sw_spi(u8x8_t *u8x8, uint8_t msg, uin
b <<= 1;
*arduino_clock_port &= arduino_clock_n_mask;
}
if (clock_polarity == 1) {
*arduino_clock_port |= arduino_clock_mask;
}
}
SREG = SREG_backup;
}
@ -468,6 +475,9 @@ extern "C" uint8_t u8x8_byte_arduino_4wire_sw_spi(u8x8_t *u8x8, uint8_t msg, uin
*arduino_clock_port &= arduino_clock_n_mask;
*arduino_clock_port |= arduino_clock_mask;
}
if (clock_polarity == 1) {
*arduino_clock_port |= arduino_clock_mask;
}
}
else
#endif
@ -483,6 +493,9 @@ extern "C" uint8_t u8x8_byte_arduino_4wire_sw_spi(u8x8_t *u8x8, uint8_t msg, uin
b <<= 1;
*arduino_clock_port |= arduino_clock_mask;
}
if (clock_polarity == 1) {
*arduino_clock_port |= arduino_clock_mask;
}
}
SREG = SREG_backup;
}
@ -517,6 +530,10 @@ extern "C" uint8_t u8x8_byte_arduino_4wire_sw_spi(u8x8_t *u8x8, uint8_t msg, uin
arduino_data_port = portOutputRegister(digitalPinToPort(u8x8->pins[U8X8_PIN_SPI_DATA]));
arduino_data_mask = digitalPinToBitMask(u8x8->pins[U8X8_PIN_SPI_DATA]);
arduino_data_n_mask = ~arduino_data_mask;
if (clock_polarity == 1) {
*arduino_clock_port |= arduino_clock_mask;
}
break;
case U8X8_MSG_BYTE_END_TRANSFER: