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fixup examples based on default pin #define-s and also support them being undefined

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This commit is contained in:
graham sanderson
2021-02-28 09:00:36 -06:00
committed by Graham Sanderson
parent 9c7e31b8e7
commit 82b6dc0576
10 changed files with 101 additions and 43 deletions
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8
dma/control_blocks/control_blocks.c
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@@ -47,6 +47,9 @@ const struct {uint32_t len; const char *data;} control_blocks[] = {
};
int main() {
#ifndef uart_default
#warning dma/control_blocks example requires a UART
#else
stdio_init_all();
puts("DMA control block example:");
@@ -81,7 +84,7 @@ int main() {
c = dma_channel_get_default_config(data_chan);
channel_config_set_transfer_data_size(&c, DMA_SIZE_8);
channel_config_set_dreq(&c, DREQ_UART0_TX + 2 * PICO_DEFAULT_UART);
channel_config_set_dreq(&c, DREQ_UART0_TX + 2 * uart_get_index(uart_default));
// Trigger ctrl_chan when data_chan completes
channel_config_set_chain_to(&c, ctrl_chan);
// Raise the IRQ flag when 0 is written to a trigger register (end of chain):
@@ -90,7 +93,7 @@ int main() {
dma_channel_configure(
data_chan,
&c,
&(PICO_DEFAULT_UART ? uart1_hw : uart0_hw)->dr,
&uart_get_hw(uart_default)->dr,
NULL, // Initial read address and transfer count are unimportant;
0, // the control channel will reprogram them each time.
false // Don't start yet.
@@ -108,4 +111,5 @@ int main() {
dma_hw->ints0 = 1u << data_chan;
puts("DMA finished.");
#endif
}