diff options
Diffstat (limited to 'tmk_core/protocol/arm_atsam/spi.h')
| -rw-r--r-- | tmk_core/protocol/arm_atsam/spi.h | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/tmk_core/protocol/arm_atsam/spi.h b/tmk_core/protocol/arm_atsam/spi.h new file mode 100644 index 000000000..4739b775d --- /dev/null +++ b/tmk_core/protocol/arm_atsam/spi.h @@ -0,0 +1,70 @@ +/* +Copyright 2018 Massdrop Inc. + +This program is free software: you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation, either version 2 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program. If not, see <http://www.gnu.org/licenses/>. +*/ + +#ifndef _SPI_H_ +#define _SPI_H_ + +/* Macros for Shift Register control */ +#define SR_EXP_RCLK_LO PORT->Group[SR_EXP_RCLK_PORT].OUTCLR.reg = (1 << SR_EXP_RCLK_PIN) +#define SR_EXP_RCLK_HI PORT->Group[SR_EXP_RCLK_PORT].OUTSET.reg = (1 << SR_EXP_RCLK_PIN) +#define SR_EXP_OE_N_ENA PORT->Group[SR_EXP_OE_N_PORT].OUTCLR.reg = (1 << SR_EXP_OE_N_PIN) +#define SR_EXP_OE_N_DIS PORT->Group[SR_EXP_OE_N_PORT].OUTSET.reg = (1 << SR_EXP_OE_N_PIN) + +/* Determine bits to set for mux selection */ +#if SR_EXP_DATAOUT_PIN % 2 == 0 +#define SR_EXP_DATAOUT_MUX_SEL PMUXE +#else +#define SR_EXP_DATAOUT_MUX_SEL PMUXO +#endif + +/* Determine bits to set for mux selection */ +#if SR_EXP_SCLK_PIN % 2 == 0 +#define SR_EXP_SCLK_MUX_SEL PMUXE +#else +#define SR_EXP_SCLK_MUX_SEL PMUXO +#endif + +/* Data structure to define Shift Register output expander hardware */ +/* This structure gets shifted into registers LSB first */ +typedef union { + struct { + uint16_t RSVD4:1; /*!< bit: 0 */ + uint16_t RSVD3:1; /*!< bit: 1 */ + uint16_t RSVD2:1; /*!< bit: 2 */ + uint16_t RSVD1:1; /*!< bit: 3 */ + uint16_t SDB_N:1; /*!< bit: 4 SHUTDOWN THE CHIP WHEN 0, RUN WHEN 1 */ + uint16_t IRST:1; /*!< bit: 5 RESET THE IS3733 I2C WHEN 1, RUN WHEN 0 */ + uint16_t SRC_2:1; /*!< bit: 6 ADVERTISE A SOURCE TO USBC-2 CC */ + uint16_t SRC_1:1; /*!< bit: 7 ADVERTISE A SOURCE TO USBC-1 CC */ + uint16_t E_VBUS_2:1; /*!< bit: 8 ENABLE 5V OUT TO USBC-2 WHEN 1 */ + uint16_t E_VBUS_1:1; /*!< bit: 9 ENABLE 5V OUT TO USBC-1 WHEN 1 */ + uint16_t E_DN1_N:1; /*!< bit: 10 ENABLE DN1 1:2 MUX WHEN 0 */ + uint16_t S_DN1:1; /*!< bit: 11 SELECT DN1 PATH 0:USBC-1, 1:USBC-2 */ + uint16_t E_UP_N:1; /*!< bit: 12 ENABLE SUP 1:2 MUX WHEN 0 */ + uint16_t S_UP:1; /*!< bit: 13 SELECT UP PATH 0:USBC-1, 1:USBC-2 */ + uint16_t HUB_RESET_N:1; /*!< bit: 14 RESET USB HUB WHEN 0, RUN WHEN 1 */ + uint16_t HUB_CONNECT:1; /*!< bit: 15 SIGNAL VBUS CONNECT TO USB HUB WHEN 1 */ + } bit; /*!< Structure used for bit access */ + uint16_t reg; /*!< Type used for register access */ +} sr_exp_t; + +extern sr_exp_t sr_exp_data; + +void SR_EXP_WriteData(void); +void SR_EXP_Init(void); + +#endif //_SPI_H_ |