xobs/fomu-flash
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

rearrange pin definitions

Browse Source 
Signed-off-by: Your Name <you@example.com>
This commit is contained in:
Your Name 2018-11-28 11:02:49 -05:00
parent 23616a1c4b
commit c2f21f1df1
2 changed files with 101 additions and 78 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
Makefile
View File

@ -51,7 +51,7 @@ $(OBJECTS): | $(OBJ_DIR)
$(TARGET): $(OBJECTS)
$(QUIET) echo " LD $@"
$(QUIET) $(CXX) $(OBJECTS) $(LFLAGS) -o $@
$(QUIET) $(CC) $(OBJECTS) $(LFLAGS) -o $@
$(DEBUG): CFLAGS += $(DBG_CFLAGS)
$(DEBUG): LFLAGS += $(DBG_LFLAGS)

177
bbflash.c
View File

@ -43,6 +43,19 @@ struct bb_spi {
enum spi_state state;
enum spi_type type;
int qpi;
struct {
int clk;
int d0;
int d1;
int d2;
int d3;
int wp;
int hold;
int cs;
int miso;
int mosi;
} pins;
};
static void spi_set_state(struct bb_spi *spi, enum spi_state state) {
@ -51,57 +64,57 @@ static void spi_set_state(struct bb_spi *spi, enum spi_state state) {
switch (state) {
case SS_SINGLE:
gpioSetMode(S_CLK, PI_OUTPUT); // CLK
gpioSetMode(S_CE0, PI_OUTPUT); // CE0#
gpioSetMode(S_MOSI, PI_OUTPUT); // MOSI
gpioSetMode(S_MISO, PI_INPUT); // MISO
gpioSetMode(S_HOLD, PI_OUTPUT);
gpioSetMode(S_WP, PI_OUTPUT);
gpioSetMode(spi->pins.clk, PI_OUTPUT); // CLK
gpioSetMode(spi->pins.cs, PI_OUTPUT); // CE0#
gpioSetMode(spi->pins.mosi, PI_OUTPUT); // MOSI
gpioSetMode(spi->pins.miso, PI_INPUT); // MISO
gpioSetMode(spi->pins.hold, PI_OUTPUT);
gpioSetMode(spi->pins.wp, PI_OUTPUT);
break;
case SS_DUAL_RX:
gpioSetMode(S_CLK, PI_OUTPUT); // CLK
gpioSetMode(S_CE0, PI_OUTPUT); // CE0#
gpioSetMode(S_MOSI, PI_INPUT); // MOSI
gpioSetMode(S_MISO, PI_INPUT); // MISO
gpioSetMode(S_HOLD, PI_OUTPUT);
gpioSetMode(S_WP, PI_OUTPUT);
gpioSetMode(spi->pins.clk, PI_OUTPUT); // CLK
gpioSetMode(spi->pins.cs, PI_OUTPUT); // CE0#
gpioSetMode(spi->pins.mosi, PI_INPUT); // MOSI
gpioSetMode(spi->pins.miso, PI_INPUT); // MISO
gpioSetMode(spi->pins.hold, PI_OUTPUT);
gpioSetMode(spi->pins.wp, PI_OUTPUT);
break;
case SS_DUAL_TX:
gpioSetMode(S_CLK, PI_OUTPUT); // CLK
gpioSetMode(S_CE0, PI_OUTPUT); // CE0#
gpioSetMode(S_MOSI, PI_OUTPUT); // MOSI
gpioSetMode(S_MISO, PI_OUTPUT); // MISO
gpioSetMode(S_HOLD, PI_OUTPUT);
gpioSetMode(S_WP, PI_OUTPUT);
gpioSetMode(spi->pins.clk, PI_OUTPUT); // CLK
gpioSetMode(spi->pins.cs, PI_OUTPUT); // CE0#
gpioSetMode(spi->pins.mosi, PI_OUTPUT); // MOSI
gpioSetMode(spi->pins.miso, PI_OUTPUT); // MISO
gpioSetMode(spi->pins.hold, PI_OUTPUT);
gpioSetMode(spi->pins.wp, PI_OUTPUT);
break;
case SS_QUAD_RX:
gpioSetMode(S_CLK, PI_OUTPUT); // CLK
gpioSetMode(S_CE0, PI_OUTPUT); // CE0#
gpioSetMode(S_MOSI, PI_INPUT); // MOSI
gpioSetMode(S_MISO, PI_INPUT); // MISO
gpioSetMode(S_HOLD, PI_INPUT);
gpioSetMode(S_WP, PI_INPUT);
gpioSetMode(spi->pins.clk, PI_OUTPUT); // CLK
gpioSetMode(spi->pins.cs, PI_OUTPUT); // CE0#
gpioSetMode(spi->pins.mosi, PI_INPUT); // MOSI
gpioSetMode(spi->pins.miso, PI_INPUT); // MISO
gpioSetMode(spi->pins.hold, PI_INPUT);
gpioSetMode(spi->pins.wp, PI_INPUT);
break;
case SS_QUAD_TX:
gpioSetMode(S_CLK, PI_OUTPUT); // CLK
gpioSetMode(S_CE0, PI_OUTPUT); // CE0#
gpioSetMode(S_MOSI, PI_OUTPUT); // MOSI
gpioSetMode(S_MISO, PI_OUTPUT); // MISO
gpioSetMode(S_HOLD, PI_OUTPUT);
gpioSetMode(S_WP, PI_OUTPUT);
gpioSetMode(spi->pins.clk, PI_OUTPUT); // CLK
gpioSetMode(spi->pins.cs, PI_OUTPUT); // CE0#
gpioSetMode(spi->pins.mosi, PI_OUTPUT); // MOSI
gpioSetMode(spi->pins.miso, PI_OUTPUT); // MISO
gpioSetMode(spi->pins.hold, PI_OUTPUT);
gpioSetMode(spi->pins.wp, PI_OUTPUT);
break;
case SS_HARDWARE:
gpioSetMode(S_CLK, PI_ALT0); // CLK
gpioSetMode(S_CE0, PI_ALT0); // CE0#
gpioSetMode(S_MOSI, PI_ALT0); // MOSI
gpioSetMode(S_MISO, PI_ALT0); // MISO
gpioSetMode(S_HOLD, PI_OUTPUT);
gpioSetMode(S_WP, PI_OUTPUT);
gpioSetMode(spi->pins.clk, PI_ALT0); // CLK
gpioSetMode(spi->pins.cs, PI_ALT0); // CE0#
gpioSetMode(spi->pins.mosi, PI_ALT0); // MOSI
gpioSetMode(spi->pins.miso, PI_ALT0); // MISO
gpioSetMode(spi->pins.hold, PI_OUTPUT);
gpioSetMode(spi->pins.wp, PI_OUTPUT);
break;
default:
@ -119,12 +132,12 @@ static void spi_pause(void) {
static void spiBegin(struct bb_spi *spi) {
spi_set_state(spi, SS_SINGLE);
gpioWrite(S_CE0, 0);
gpioWrite(spi->pins.cs, 0);
}
static void spiEnd(struct bb_spi *spi) {
(void)spi;
gpioWrite(S_CE0, 1);
gpioWrite(spi->pins.cs, 1);
}
static uint8_t spiXfer(struct bb_spi *spi, uint8_t out) {
@ -132,15 +145,15 @@ static uint8_t spiXfer(struct bb_spi *spi, uint8_t out) {
uint8_t in = 0;
for (bit = 7; bit >= 0; bit--) {
if (out & (1 << bit)) {
gpioWrite(S_MOSI, 1);
gpioWrite(spi->pins.mosi, 1);
}
else {
gpioWrite(S_MOSI, 0);
gpioWrite(spi->pins.mosi, 0);
}
gpioWrite(S_CLK, 1);
gpioWrite(spi->pins.clk, 1);
spi_pause();
in |= ((!!gpioRead(S_MISO)) << bit);
gpioWrite(S_CLK, 0);
in |= ((!!gpioRead(spi->pins.miso)) << bit);
gpioWrite(spi->pins.clk, 0);
spi_pause();
}
return in;
@ -161,21 +174,21 @@ static void spiDualTx(struct bb_spi *spi, uint8_t out) {
spi_set_state(spi, SS_DUAL_TX);
for (bit = 7; bit >= 0; bit -= 2) {
if (out & (1 << (bit - 1))) {
gpioWrite(S_D0, 1);
gpioWrite(spi->pins.d0, 1);
}
else {
gpioWrite(S_D0, 0);
gpioWrite(spi->pins.d0, 0);
}
if (out & (1 << (bit - 0))) {
gpioWrite(S_D1, 1);
gpioWrite(spi->pins.d1, 1);
}
else {
gpioWrite(S_D1, 0);
gpioWrite(spi->pins.d1, 0);
}
gpioWrite(S_CLK, 1);
gpioWrite(spi->pins.clk, 1);
spi_pause();
gpioWrite(S_CLK, 0);
gpioWrite(spi->pins.clk, 0);
spi_pause();
}
}
@ -185,35 +198,35 @@ static void spiQuadTx(struct bb_spi *spi, uint8_t out) {
spi_set_state(spi, SS_QUAD_TX);
for (bit = 7; bit >= 0; bit -= 4) {
if (out & (1 << (bit - 3))) {
gpioWrite(S_D0, 1);
gpioWrite(spi->pins.d0, 1);
}
else {
gpioWrite(S_D0, 0);
gpioWrite(spi->pins.d0, 0);
}
if (out & (1 << (bit - 2))) {
gpioWrite(S_D1, 1);
gpioWrite(spi->pins.d1, 1);
}
else {
gpioWrite(S_D1, 0);
gpioWrite(spi->pins.d1, 0);
}
if (out & (1 << (bit - 1))) {
gpioWrite(S_D2, 1);
gpioWrite(spi->pins.d2, 1);
}
else {
gpioWrite(S_D2, 0);
gpioWrite(spi->pins.d2, 0);
}
if (out & (1 << (bit - 0))) {
gpioWrite(S_D3, 1);
gpioWrite(spi->pins.d3, 1);
}
else {
gpioWrite(S_D3, 0);
gpioWrite(spi->pins.d3, 0);
}
gpioWrite(S_CLK, 1);
gpioWrite(spi->pins.clk, 1);
spi_pause();
gpioWrite(S_CLK, 0);
gpioWrite(spi->pins.clk, 0);
spi_pause();
}
}
@ -231,11 +244,11 @@ static uint8_t spiDualRx(struct bb_spi *spi) {
spi_set_state(spi, SS_QUAD_RX);
for (bit = 7; bit >= 0; bit -= 2) {
gpioWrite(S_CLK, 1);
gpioWrite(spi->pins.clk, 1);
spi_pause();
in |= ((!!gpioRead(S_D0)) << (bit - 1));
in |= ((!!gpioRead(S_D1)) << (bit - 0));
gpioWrite(S_CLK, 0);
in |= ((!!gpioRead(spi->pins.d0)) << (bit - 1));
in |= ((!!gpioRead(spi->pins.d1)) << (bit - 0));
gpioWrite(spi->pins.clk, 0);
spi_pause();
}
return in;
@ -247,13 +260,13 @@ static uint8_t spiQuadRx(struct bb_spi *spi) {
spi_set_state(spi, SS_QUAD_RX);
for (bit = 7; bit >= 0; bit -= 4) {
gpioWrite(S_CLK, 1);
gpioWrite(spi->pins.clk, 1);
spi_pause();
in |= ((!!gpioRead(S_D0)) << (bit - 3));
in |= ((!!gpioRead(S_D1)) << (bit - 2));
in |= ((!!gpioRead(S_D2)) << (bit - 1));
in |= ((!!gpioRead(S_D3)) << (bit - 0));
gpioWrite(S_CLK, 0);
in |= ((!!gpioRead(spi->pins.d0)) << (bit - 3));
in |= ((!!gpioRead(spi->pins.d1)) << (bit - 2));
in |= ((!!gpioRead(spi->pins.d2)) << (bit - 1));
in |= ((!!gpioRead(spi->pins.d3)) << (bit - 0));
gpioWrite(spi->pins.clk, 0);
spi_pause();
}
return in;
@ -550,13 +563,13 @@ uint8_t spiReset(struct bb_spi *spi) {
return 0;
}
void fpgaSlaveMode(void) {
void fpgaSlaveMode(struct bb_spi *spi) {
// Set the CS pin to a GPIO, which will let us control it
gpioSetMode(S_CE0, PI_OUTPUT);
gpioSetMode(spi->pins.cs, PI_OUTPUT);
// Set CS to 0, which will put the FPGA into slave mode
gpioWrite(S_CE0, 0);
gpioWrite(spi->pins.cs, 0);
usleep(10000); // XXX figure out correct sleep length here
@ -641,12 +654,22 @@ int main(int argc, char *argv[])
* To program the FPGA
*/
spi.pins.clk = S_CLK;
spi.pins.d0 = S_D0;
spi.pins.d1 = S_D1;
spi.pins.d2 = S_D2;
spi.pins.d3 = S_D3;
spi.pins.miso = S_MISO;
spi.pins.mosi = S_MOSI;
spi.pins.hold = S_HOLD;
spi.pins.wp = S_WP;
spi.pins.cs = S_CE0;
// Have the SPI flash pay attention to us
gpioWrite(S_HOLD, 1);
gpioWrite(spi.pins.hold, 1);
// Disable WP
gpioWrite(S_WP, 1);
gpioWrite(spi.pins.wp, 1);
// Put the FPGA into reset
gpioSetMode(F_RESET, PI_OUTPUT);
@ -702,7 +725,7 @@ int main(int argc, char *argv[])
{
uint8_t check_data[sizeof(data)];
spiRead(&spi, 0, check_data, sizeof(check_data));
int j;
size_t j;
for (j=0; j<sizeof(check_data); j++) {
if (data[j] != check_data[j]) {
fprintf(stderr, "check data %d different: %02x vs %02x\n", j, check_data[j], data[j]);
@ -714,10 +737,10 @@ int main(int argc, char *argv[])
fprintf(stderr, "Programming result: %d\n", result);
// Deassert CS
gpioWrite(S_CE0, 1);
gpioWrite(spi.pins.cs, 1);
// Deassert hold, if set
gpioWrite(S_HOLD, 1);
gpioWrite(spi.pins.hold, 1);
// Return the SPI pins to SPI mode, so we can talk to
// the FPGA normally