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| author | Kevin O'Connor <kevin@koconnor.net> | 2018-07-27 19:22:44 -0400 |
|---|---|---|
| committer | Kevin O'Connor <kevin@koconnor.net> | 2018-08-07 00:03:18 -0400 |
| commit | 74cf4dc9e0fa129b315b398d8e70e4df20b26aea (patch) | |
| tree | 6cb71cb9d79135bd1f850285bf3721e1f89022e2 /src/samd21/gpio.c | |
| parent | 71db5fbe316feb863b5c67bb7f9bb928c0decbe2 (diff) | |
| download | kutter-74cf4dc9e0fa129b315b398d8e70e4df20b26aea.tar.gz kutter-74cf4dc9e0fa129b315b398d8e70e4df20b26aea.tar.xz kutter-74cf4dc9e0fa129b315b398d8e70e4df20b26aea.zip | |
samd21: Initial support for SAMD21 micro-controllers
Add initial support for the Atmel SAMD21 micro-controllers.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Diffstat (limited to 'src/samd21/gpio.c')
| -rw-r--r-- | src/samd21/gpio.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/src/samd21/gpio.c b/src/samd21/gpio.c new file mode 100644 index 00000000..3ae51f74 --- /dev/null +++ b/src/samd21/gpio.c @@ -0,0 +1,22 @@ +// samd21 gpio functions +// +// Copyright (C) 2018 Kevin O'Connor <kevin@koconnor.net> +// +// This file may be distributed under the terms of the GNU GPLv3 license. + +#include "internal.h" // gpio_peripheral +#include "samd21.h" // PORT + +void +gpio_peripheral(char bank, uint32_t bit, char ptype, uint32_t pull_up) +{ + int group = bank == 'A' ? 0 : 1; + PortGroup *pg = &PORT->Group[group]; + if (ptype) { + volatile uint8_t *pmux = &pg->PMUX[bit/2].reg; + uint8_t shift = (bit & 1) ? 4 : 0, mask = ~(0xf << shift); + *pmux = (*pmux & mask) | ((ptype - 'A') << shift); + } + pg->PINCFG[bit].reg = ((ptype ? PORT_PINCFG_PMUXEN : 0) + | (pull_up ? PORT_PINCFG_PULLEN : 0)); +} |