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atsamd: Use enumerations for buses and reserve pins

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Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor
2019-03-31 23:37:17 -04:00
parent 7e8ecfe177
commit bc9fd03dab
9 changed files with 37 additions and 32 deletions
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11
src/atsamd/sercom.c
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@@ -15,6 +15,8 @@
* Available sercom blocks
****************************************************************/
DECL_ENUMERATION_RANGE("bus", "sercom0", 0, 8);
struct sercom_bus {
Sercom *sercom;
uint32_t pclk_id, pm_id;
@@ -39,7 +41,7 @@ Sercom *
sercom_enable_pclock(uint32_t sercom_id)
{
if (sercom_id >= ARRAY_SIZE(sercoms))
shutdown("Invalid sercom bus");
shutdown("Invalid SERCOM bus");
const struct sercom_bus *sb = &sercoms[sercom_id];
enable_pclock(sb->pclk_id, sb->pm_id);
return sb->sercom;
@@ -290,6 +292,9 @@ sercom_lookup_pad(uint32_t sercom_id, uint8_t pin)
****************************************************************/
enum { TX_PIN, RX_PIN, CLK_PIN };
DECL_ENUMERATION("sercom_pin_type", "tx", TX_PIN);
DECL_ENUMERATION("sercom_pin_type", "rx", RX_PIN);
DECL_ENUMERATION("sercom_pin_type", "clk", CLK_PIN);
// Runtime configuration
struct sercom_pin {
@@ -308,7 +313,7 @@ command_set_sercom_pin(uint32_t *args)
sercom_pins[sercom_id].pins[pin_type] = pin;
}
DECL_COMMAND(command_set_sercom_pin,
"set_sercom_pin sercom_id=%u pin_type=%u pin=%u");
"set_sercom_pin bus=%u sercom_pin_type=%u pin=%u");
/****************************************************************
@@ -349,6 +354,8 @@ sercom_lookup_spi_dopo(uint8_t tx_pad, uint8_t clk_pad)
uint32_t
sercom_spi_pins(uint32_t sercom_id)
{
if (sercom_id >= ARRAY_SIZE(sercom_pins))
shutdown("Invalid SERCOM bus");
uint8_t tx_pin = sercom_pins[sercom_id].pins[TX_PIN];
const struct sercom_pad *tx_sp = sercom_lookup_pad(sercom_id, tx_pin);
uint8_t rx_pin = sercom_pins[sercom_id].pins[RX_PIN];