Michel2/OneWire
1
0
Fork 0
mirror of https://github.com/PaulStoffregen/OneWire.git synced 2026-07-27 19:57:07 +00:00
Code Issues Packages Projects Releases Wiki Activity

Merge pull request #41 from cbxbiker61/master

Browse Source 
initial support for riscv/highfive1
This commit is contained in:
Paul Stoffregen
2017-09-03 18:58:08 -07:00
committed by GitHub
parent 65be657de5 910f623f4d
commit e8eb2c30f5
1 changed files with 58 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
OneWire.h
+58
View File
@@ -340,6 +340,64 @@ void directWriteHigh(volatile IO_REG_TYPE *base, IO_REG_TYPE pin)
#define DIRECT_WRITE_LOW(base, pin) directWriteLow(base, pin)
#define DIRECT_WRITE_HIGH(base, pin) directWriteHigh(base, pin)
#elif defined(__riscv)
/*
* Tested on highfive1
*
* Stable results are achieved operating in the
* two high speed modes of the highfive1. It
* seems to be less reliable in slow mode.
*/
#define PIN_TO_BASEREG(pin) (0)
#define PIN_TO_BITMASK(pin) digitalPinToBitMask(pin)
#define IO_REG_TYPE uint32_t
#define IO_REG_ASM
static inline __attribute__((always_inline))
IO_REG_TYPE directRead(IO_REG_TYPE mask)
{
return ((GPIO_REG(GPIO_INPUT_VAL) & mask) != 0) ? 1 : 0;
}
static inline __attribute__((always_inline))
void directModeInput(IO_REG_TYPE mask)
{
GPIO_REG(GPIO_OUTPUT_XOR) &= ~mask;
GPIO_REG(GPIO_IOF_EN) &= ~mask;
GPIO_REG(GPIO_INPUT_EN) |= mask;
GPIO_REG(GPIO_OUTPUT_EN) &= ~mask;
}
static inline __attribute__((always_inline))
void directModeOutput(IO_REG_TYPE mask)
{
GPIO_REG(GPIO_OUTPUT_XOR) &= ~mask;
GPIO_REG(GPIO_IOF_EN) &= ~mask;
GPIO_REG(GPIO_INPUT_EN) &= ~mask;
GPIO_REG(GPIO_OUTPUT_EN) |= mask;
}
static inline __attribute__((always_inline))
void directWriteLow(IO_REG_TYPE mask)
{
GPIO_REG(GPIO_OUTPUT_VAL) &= ~mask;
}
static inline __attribute__((always_inline))
void directWriteHigh(IO_REG_TYPE mask)
{
GPIO_REG(GPIO_OUTPUT_VAL) |= mask;
}
#define DIRECT_READ(base, mask) directRead(mask)
#define DIRECT_WRITE_LOW(base, mask) directWriteLow(mask)
#define DIRECT_WRITE_HIGH(base, mask) directWriteHigh(mask)
#define DIRECT_MODE_INPUT(base, mask) directModeInput(mask)
#define DIRECT_MODE_OUTPUT(base, mask) directModeOutput(mask)
#else
#define PIN_TO_BASEREG(pin) (0)
#define PIN_TO_BITMASK(pin) (pin)