diff options
Diffstat (limited to 'software/avr.lib')
-rw-r--r-- | software/avr.lib/cc1101.c | 85 | ||||
-rw-r--r-- | software/avr.lib/cc1101.h | 14 | ||||
-rw-r--r-- | software/avr.lib/cc1101_defines.h | 7 |
3 files changed, 90 insertions, 16 deletions
diff --git a/software/avr.lib/cc1101.c b/software/avr.lib/cc1101.c index e083df8..2023c01 100644 --- a/software/avr.lib/cc1101.c +++ b/software/avr.lib/cc1101.c @@ -25,30 +25,99 @@ #include "cc1101.h" #include "cc1101_defines.h" +static cc1101_driver_conf_t drv = { + .spi_cs_enable = NULL, + .spi_cs_disable = NULL, + .spi_read_miso = NULL, + .spi_write_byte = NULL, + .spi_read_byte = NULL, + .spi_transfer_byte = NULL, + .freq_corr = 0.0 +}; + /* - * EXTERNAL INTERFACE + * internal functions */ -void cc1101_init(void) +static inline void cc1101_spi_wait_rdy(void) +{ + while(drv.spi_read_miso()); // wait for CHP_RDY to go low, TODO: timeout... +} + +static uint8_t cc1101_spi_strobe_command(uint8_t cmd) { + if(cmd < CC1101_CMD_MIN || cmd > CC1101_CMD_MAX) + return -1; + + drv.spi_cs_enable(); + cc1101_spi_wait_rdy(); + uint8_t status = drv.spi_transfer_byte(CC1101_HEADER_COMMAND | cmd); + + drv.spi_cs_disable(); + return status; } -void cc1101_reg_init(void) +static uint8_t cc1101_spi_read_register(uint8_t addr) { + if(addr > CC1101_ADDR_MAX) + return 0xFF; + if(addr > CC1101_REG_RW_MAX) + addr |= CC1101_HEADER_READONLY; + else + addr |= CC1101_HEADER_READ; + + drv.spi_cs_enable(); + cc1101_spi_wait_rdy(); + + drv.spi_write_byte(addr); + uint8_t data = drv.spi_read_byte(); + + drv.spi_cs_disable(); + return data; } -void cc1101_soft_reset(void) +static void cc1101_spi_write_register(uint8_t addr, uint8_t data) { + if(addr > CC1101_REG_RW_MAX) + return; + drv.spi_cs_enable(); + cc1101_spi_wait_rdy(); + + drv.spi_write_byte(CC1101_HEADER_WRITE | addr); + drv.spi_write_byte(data); + + drv.spi_cs_disable(); } -void cc1101_powerdown(void) +/* + * EXTERNAL INTERFACE + */ + +void cc1101_init(cc1101_driver_conf_t conf) +{ + drv = conf; +} + +void cc1101_reg_init(void) { + // Set freq to 437.525 MHz + cc1101_spi_write_register(CC1101_REG_RW_FREQ2,0x10); //Frequency Control Word, High Byte + cc1101_spi_write_register(CC1101_REG_RW_FREQ1,0xD3); //Frequency Control Word, Middle Byte + cc1101_spi_write_register(CC1101_REG_RW_FREQ0,0xF0); //Frequency Control Word, Low Byte +} +void cc1101_soft_reset(void) +{ + cc1101_spi_strobe_command(CC1101_CMD_SRES); } +void cc1101_powerdown(void) +{ + cc1101_spi_strobe_command(CC1101_CMD_SPWD); +} static char* cc1101_config_reg_to_string(uint8_t addr) { @@ -107,7 +176,7 @@ static char* cc1101_config_reg_to_string(uint8_t addr) static char* cc1101_status_reg_to_string(uint8_t addr) { switch(addr) { - case CC1101_REG_RO_PARTNUM: return "PARNUM"; + case CC1101_REG_RO_PARTNUM: return "PARTNUM"; case CC1101_REG_RO_VERSION: return "VERSION"; case CC1101_REG_RO_FREQUEST: return "FREQUEST"; case CC1101_REG_RO_LQI: return "LQI"; @@ -133,14 +202,14 @@ void cc1101_dump_register(void) printf(" config (read/write) register:\r\n"); for(i=0; i<=CC1101_REG_RW_MAX; ++i) { - uint8_t data = 0xFF; // TODO: actually read value + uint8_t data = cc1101_spi_read_register(i); // TODO: use burst mode... printf(" 0x%02X (%s): 0x%02X\r\n", i, cc1101_config_reg_to_string(i), data); } printf("\r\n"); printf(" status (read-only) register:\r\n"); for(i=CC1101_REG_RO_MIN; i<=CC1101_REG_RO_MAX; ++i) { - uint8_t data = 0xFF; // TODO: actually read value + uint8_t data = cc1101_spi_read_register(i); printf(" 0x%02X (%s): 0x%02X\r\n", i, cc1101_status_reg_to_string(i), data); } printf("\r\n"); diff --git a/software/avr.lib/cc1101.h b/software/avr.lib/cc1101.h index 1519a3d..c5690e0 100644 --- a/software/avr.lib/cc1101.h +++ b/software/avr.lib/cc1101.h @@ -23,7 +23,19 @@ #ifndef SPREADAVR_cc1101_h_INCLUDED #define SPREADAVR_cc1101_h_INCLUDED -void cc1101_init(void); +#define CC1101_FREQ_CORR(xtal) ((float)(xtal/65536.0)) + +typedef struct { + void (*spi_cs_enable)(void); + void (*spi_cs_disable)(void); + uint8_t (*spi_read_miso)(void); + void (*spi_write_byte)(const uint8_t); + uint8_t (*spi_read_byte)(void); + uint8_t (*spi_transfer_byte)(const uint8_t); + float freq_corr; +} cc1101_driver_conf_t; + +void cc1101_init(cc1101_driver_conf_t conf); void cc1101_reg_init(void); void cc1101_soft_reset(void); void cc1101_powerdown(void); diff --git a/software/avr.lib/cc1101_defines.h b/software/avr.lib/cc1101_defines.h index e9e2e67..51ba6ea 100644 --- a/software/avr.lib/cc1101_defines.h +++ b/software/avr.lib/cc1101_defines.h @@ -143,11 +143,4 @@ #define CC1101_FIFO_MAX_LEN 64 -//freq Fosc/65536 -#ifdef CC1101_QUARTZ_26M -#define CC1101_FREQ_CORR 396.728515 // = 26000000/65536 -#else -#error Please set Quartz Frequency using the variable: CC1101_QUARTZ_* -#endif // CC1101_QUARTZ_26M - #endif |