diff options
Diffstat (limited to 'firmware/octoclock/lib/clkdist.c')
| -rw-r--r-- | firmware/octoclock/lib/clkdist.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/firmware/octoclock/lib/clkdist.c b/firmware/octoclock/lib/clkdist.c index ed29510b6..0468ac38e 100644 --- a/firmware/octoclock/lib/clkdist.c +++ b/firmware/octoclock/lib/clkdist.c @@ -21,6 +21,8 @@ #include <clkdist.h> #include <state.h> +#include <util/delay.h> + #define wait() for(uint16_t u=14000; u; u--) asm("nop"); #define CLK (PA0) // Shift by 0 bits @@ -33,7 +35,7 @@ // Table of 32-bit constants to be written to the TI chip's registers. These are // from the "Special Settings" on Page 35 of the datasheet. // For the GPS's 10 MHz output -static uint32_t table_Pri_Ref[] = { +static const uint32_t table_Pri_Ref[] = { Bits_32(1,01010100,0,0), // Reg 0 Bits_32(1,01010100,0,0), // Outputs LVCMOS Positive&Negative Active - Non-inverted Bits_32(1,01010100,0,0), @@ -47,7 +49,7 @@ static uint32_t table_Pri_Ref[] = { // For the External 10 MHz input LVDS with external termination, // Effectively DC coupled -static uint32_t table_Sec_Ref[] = { +static const uint32_t table_Sec_Ref[] = { Bits_32(0001,01010100,0,100000), // Reg 0 -- use Secondary Reference for all channels Bits_32(0001,01010100,0,100000), // Outputs LVCMOS Positive&Negative Active - Non-inverted Bits_32(0001,01010100,0,100000), @@ -81,7 +83,6 @@ static bool get_bit(uint8_t bit_number) { // Send 32 bits to TI chip, LSB first. // Don't worry about reading any bits back at this time static void send_SPI(uint32_t bits) { - // Basically, when the clock is low, one can set MOSI to anything, as it's // ignored. set_bit(CE_, Lo); // Start SPI transaction with TI chip @@ -130,7 +131,8 @@ void setup_TI_CDCE18005(TI_Input_10_MHz which_input) { for(uint8_t i=0; i<table_size; i++){ temp = table_Pri_Ref[i]<<4; temp |= i; - send_SPI(temp); // Make sure the register's address is in the LSBs + // Make sure the register's address is in the LSBs + send_SPI(temp); } } else { // is Secondary_Ext -- External 10 MHz input from SMA connector @@ -169,6 +171,10 @@ uint32_t get_TI_CDCE18005(CDCE18005 which_register){ return receive_SPI(); } +void set_TI_CDCE18005(CDCE18005 which_register, uint32_t bits){ + send_SPI((bits << 4) | which_register); +} + bool check_TI_CDCE18005(TI_Input_10_MHz which_input, CDCE18005 which_register) { |