64 lines
948 B
C
64 lines
948 B
C
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#include <8051.h>
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#include <stdint.h>
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#include "i2c.h"
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#include "si5351.h"
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#define BOOT_ADDR 0x3800
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/* This function provided a way to the internal bootloader */
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void jump_to_bootloader()
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{
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EA = 0;/* Disable all interrupts */
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__asm
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LJMP BOOT_ADDR /* Jump to bootloader */
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__endasm;
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while(1);
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}
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bool si5351_write(uint8_t reg_address, uint8_t value)
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{
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i2c_start();
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i2c_write(SI5351_AR);
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if(i2c_read_nak())
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goto fault;
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i2c_write(reg_address);
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if(i2c_read_nak())
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goto fault;
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i2c_write(value);
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if(i2c_read_nak())
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goto fault;
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i2c_stop();
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return 1;
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fault:
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i2c_stop();
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return 0;
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}
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bool si5351_init()
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{
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si5351a_revb_register_t __code *pair;
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int i;
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for(i = 0; i < SI5351A_REVB_REG_CONFIG_NUM_REGS; i++)
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{
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pair = &si5351a_revb_registers[i];
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if(!si5351_write(pair->address & 0xff, pair->value))
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return 0;
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}
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return 1;
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}
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void main( void )
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{
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i2c_init();
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si5351_init();
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jump_to_bootloader();
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}
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