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Add flipped connector for parallel arduino

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This commit is contained in:
Jeremy Soller 2020-01-16 14:38:53 -07:00
parent fca09adf56
commit 97eb217650
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GPG Key ID: E988B49EE78A7FB1
1 changed files with 26 additions and 6 deletions
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32
src/board/arduino/mega2560/parallel.c
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@ -52,6 +52,8 @@
DATA_BIT(6) \
DATA_BIT(7)
#define FLIP
#if !defined(FLIP)
// Mapping of 24-pin ribbon cable to GPIOs
static struct Gpio GPIOS[24] = {
GPIO(L, 4), GPIO(L, 5),
@ -67,6 +69,24 @@ static struct Gpio GPIOS[24] = {
GPIO(A, 3), GPIO(A, 2),
GPIO(A, 1), GPIO(A, 0),
};
#else // !defined(FLIP)
// Mapping of 24-pin ribbon cable to GPIOs, flipped
static struct Gpio GPIOS[24] = {
GPIO(L, 5), GPIO(L, 4),
GPIO(L, 7), GPIO(L, 6),
GPIO(G, 1), GPIO(G, 0),
GPIO(D, 7), GPIO(G, 2),
GPIO(C, 1), GPIO(C, 0),
GPIO(C, 3), GPIO(C, 2),
GPIO(C, 5), GPIO(C, 4),
GPIO(C, 7), GPIO(C, 6),
GPIO(A, 6), GPIO(A, 7),
GPIO(A, 4), GPIO(A, 5),
GPIO(A, 2), GPIO(A, 3),
GPIO(A, 0), GPIO(A, 1),
};
#endif // !defined(FLIP)
// Parallel struct definition
// See http://efplus.com/techref/io/parallel/1284/eppmode.htm
@ -101,7 +121,7 @@ void parallel_reset(struct Parallel * port) {
// Wait 1 microsecond
_delay_us(1);
// Make sure strobes are high outputs
gpio_set(port->data_n, true);
gpio_set(port->addr_n, true);
@ -121,7 +141,7 @@ void parallel_reset(struct Parallel * port) {
#undef DATA_BIT
//TODO: something with straps
// Wait 1 microsecond
_delay_us(1);
@ -146,7 +166,7 @@ int parallel_transaction(struct Parallel * port, uint8_t * data, int length, boo
for (i = 0; i < length; i++) {
// Wait for wait line to be low
while (gpio_get(port->wait_n)) {}
if (!read) {
// Set data low where necessary
byte = data[i];
@ -221,7 +241,7 @@ int parallel_spi_reset(struct Parallel *port) {
res = parallel_set_address(port, &ADDRESS_INDAR1, 1);
if (res < 0) return res;
res = parallel_write(port, &SPI_ENABLE, 1);
if (res < 0) return res;
@ -237,7 +257,7 @@ int parallel_spi_transaction(struct Parallel *port, uint8_t * data, int length,
res = parallel_set_address(port, &ADDRESS_INDAR1, 1);
if (res < 0) return res;
res = parallel_write(port, &SPI_DATA, 1);
if (res < 0) return res;
@ -366,7 +386,7 @@ int parallel_main(void) {
data[i] = 0;
}
}
// Write data to serial
res = serial_write(data, length);
if (res < 0) goto err;