nRF51: how to simply port nRF51822 code to nRF51802

For some reasons you might need nRF51802 instead of nRF51822: hardware I2C, more PWM channel ...This article shows how to simply port the code developed on nRF51822 to  nRF51802.

nRF51802 MUST use SDK11 or LATER.

STEP 1. open "pca10028.h"

about line.150 , there are code like this:

#define NRF_CLOCK_LFCLKSRC      {.source        = NRF_CLOCK_LF_SRC_XTAL,            \
                                 .rc_ctiv       = 0,                                \
                                 .rc_temp_ctiv  = 0,                                \
                                 .xtal_accuracy = NRF_CLOCK_LF_XTAL_ACCURACY_20_PPM}

change like this :

/*power by AgathaKuan*/
#ifndef NRF51802
#define NRF_CLOCK_LFCLKSRC      {.source        = NRF_CLOCK_LF_SRC_XTAL,            \
                                 .rc_ctiv       = 0,                                \
                                 .rc_temp_ctiv  = 0,                                \
                                 .xtal_accuracy = NRF_CLOCK_LF_XTAL_ACCURACY_20_PPM}
#else
#define NRF_CLOCK_LFCLKSRC      {.source        = NRF_CLOCK_LF_SRC_SYNTH,            \
                                 .rc_ctiv       = 0,                                \
                                 .rc_temp_ctiv  = 0,                                \
                                 .xtal_accuracy = NRF_CLOCK_LF_XTAL_ACCURACY_20_PPM}
#endif

STEP 2. check your UART pins
at about line 65

#define RX_PIN_NUMBER  11
#define TX_PIN_NUMBER  9

but nRF51802 DEFAULT UART pins are P0_1 &P0_4
(as nRF51822  TWI pins)

so, change as

#ifndef NRF51802
#define RX_PIN_NUMBER  11
#define TX_PIN_NUMBER  9
#else

#define RX_PIN_NUMBER  1
#define TX_PIN_NUMBER  4
#endif

(The UART pin should be refered to your circuit diagram, please check it or ask your circuit engineer)


STEP 3. add nrf51802 definition
add this at about line 60 in "pca10028"

#define NRF51802

STEP 4. press to "re-built all"

press the button to re-build all , than load it into nRF51802

Addition:
1. if you also need to use TWI pins, open "twi_master_config.h" and change the following definition
as your specified pins.

#ifndef TWI_MASTER_CONFIG
#define TWI_MASTER_CONFIG

/*agatha: change the following definition to pin numbers you want*/
#define TWI_MASTER_CONFIG_CLOCK_PIN_NUMBER (YOUR_SCL_PIN)
#define TWI_MASTER_CONFIG_DATA_PIN_NUMBER (YOUR_SDA_PIN) 


#endif