Malavika S / ADxxxx

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ADxxxx.cpp@2:1857aa1363ef, 2019-07-19 (annotated)

Committer:
MitchAD
Date:
Fri Jul 19 00:12:11 2019 +0000
Revision:
2:1857aa1363ef
Parent:
1:9524c69f480d
Child:
3:ecb47ce6f212
To do: ; 1. Still make quasi calibrate function (maybe not); 2a. Go through and make sure it is readable and easy to understand; 2b. Add more hints about what certain things do?; 2c. Make it super usable!;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
MitchAD 1:9524c69f480d 1 /******************************/
MitchAD 1:9524c69f480d 2 /* C FILE TEMPLATE */
MitchAD 1:9524c69f480d 3 /******************************/
MitchAD 1:9524c69f480d 4 #include "mbed.h" /*Neccessary Include Files*/
MitchAD 1:9524c69f480d 5 #include "ADxxxx.h"
MitchAD 1:9524c69f480d 6
MitchAD 1:9524c69f480d 7 /*Actual Declaration of all registers
MitchAD 1:9524c69f480d 8 based on the four fields declared in
MitchAD 1:9524c69f480d 9 the header file
MitchAD 1:9524c69f480d 10 {Address, Value, Size, Read or Write}*/
MitchAD 2:1857aa1363ef 11 struct adxxxx_reg adxxxx_all_regs[ADXXXX_REG_NUM] = {
MitchAD 2:1857aa1363ef 12 {0x00, 0x00, 1, 1}, /*EX_ADXXXX_POWER_ON*/
MitchAD 2:1857aa1363ef 13 {0x01, 0x00, 1, 1}, /*EX_ADXXXX_POWER_LEVEL*/
MitchAD 2:1857aa1363ef 14 {0x02, 0x00, 1, 1}, /*EX_ADXXXX_CALIBRATION*/
MitchAD 1:9524c69f480d 15 };
MitchAD 1:9524c69f480d 16
MitchAD 1:9524c69f480d 17 /*Function to malloc space for descriptor as well
MitchAD 1:9524c69f480d 18 as start the proper serial communication
MitchAD 1:9524c69f480d 19 **You should only be using either SPI or I2C at once**
MitchAD 1:9524c69f480d 20 Parameters: Pointer to a pointer to the device descriptor
MitchAD 1:9524c69f480d 21 Return Value: SUCCESS, FAILURE (You can make these more appropriate return
MitchAD 1:9524c69f480d 22 values if you would like, making it more
MitchAD 1:9524c69f480d 23 readable)*/
MitchAD 2:1857aa1363ef 24 int adxxxx_setup(struct adxxxx_descriptor **device, struct adxxxx_init_params init_param) {
MitchAD 1:9524c69f480d 25
MitchAD 1:9524c69f480d 26 int8_t return_val = 1;
MitchAD 1:9524c69f480d 27 struct adxxxx_descriptor * desc;
MitchAD 2:1857aa1363ef 28 extern struct adxxxx_reg adxxxx_all_regs[ADXXXX_REG_NUM];
MitchAD 1:9524c69f480d 29
MitchAD 1:9524c69f480d 30 desc = (struct adxxxx_descriptor *)malloc(sizeof(*desc));
MitchAD 1:9524c69f480d 31 if (!desc)
MitchAD 1:9524c69f480d 32 return FAILURE;
MitchAD 1:9524c69f480d 33
MitchAD 1:9524c69f480d 34 desc->all_regs = adxxxx_all_regs;
MitchAD 1:9524c69f480d 35
MitchAD 1:9524c69f480d 36 /*Example of turning the device on and calibrating
MitchAD 1:9524c69f480d 37 it, but clearly this is device specific*/
MitchAD 2:1857aa1363ef 38 desc->is_calibrated = ADXXXX_NOT_CALIBRATED;
MitchAD 2:1857aa1363ef 39 desc->power_level = ADXXXX_POW_IDLE;
MitchAD 1:9524c69f480d 40
MitchAD 2:1857aa1363ef 41 /*Uncomment the protocol your device uses*/
MitchAD 1:9524c69f480d 42 //return_val = spi_init(&desc->spi_desc, &init_params.spi_init);
MitchAD 1:9524c69f480d 43 //return_val = i2c_init(&desc->i2c_desc, &init_params.i2c_init);
MitchAD 1:9524c69f480d 44 if (return_val < 1)
MitchAD 1:9524c69f480d 45 return FAILURE;
MitchAD 1:9524c69f480d 46
MitchAD 1:9524c69f480d 47 *device = desc;
MitchAD 1:9524c69f480d 48 return SUCCESS;
MitchAD 2:1857aa1363ef 49 }
MitchAD 2:1857aa1363ef 50
MitchAD 2:1857aa1363ef 51 /*Function to sweep through all of the registers and set them
MitchAD 2:1857aa1363ef 52 to their initial values
MitchAD 2:1857aa1363ef 53 Parameters: Pointer to adxxxx's descriptor
MitchAD 2:1857aa1363ef 54 Return Value: SUCCESS, FAILURE*/
MitchAD 2:1857aa1363ef 55 int adxxxx_init_regs(struct adxxxx_descriptor *device) {
MitchAD 2:1857aa1363ef 56 /*Sweep through all of the registers that you initialized
MitchAD 2:1857aa1363ef 57 in the struct above and write all the values to the device
MitchAD 2:1857aa1363ef 58 (Could return register that failed to be written to may be
MitchAD 2:1857aa1363ef 59 helpful for debugging)*/
MitchAD 2:1857aa1363ef 60 return SUCCESS;
MitchAD 2:1857aa1363ef 61 }
MitchAD 2:1857aa1363ef 62
MitchAD 2:1857aa1363ef 63 /*Function to make a single or multi read from the device, based off
MitchAD 2:1857aa1363ef 64 the registers size which you can find in the devices data sheet
MitchAD 2:1857aa1363ef 65 Parameters: Pointer to adxxxx's descriptor, register struct to read from
MitchAD 2:1857aa1363ef 66 Return Value: SUCCESS, FAILURE*/
MitchAD 2:1857aa1363ef 67 int adxxx_read(struct adxxxx_descriptor *device, struct adxxxx_reg* reg) {
MitchAD 2:1857aa1363ef 68 /*Follow your devices specific write protocol (I2C, SPI) in conjunction
MitchAD 2:1857aa1363ef 69 with the platform specific drivers to effectively communicate with your
MitchAD 2:1857aa1363ef 70 device (A good first step is perhaps reading your devices ID register
MitchAD 2:1857aa1363ef 71 or something else that is easy to get to)*/
MitchAD 2:1857aa1363ef 72 return SUCCESS;
MitchAD 2:1857aa1363ef 73 }
MitchAD 2:1857aa1363ef 74
MitchAD 2:1857aa1363ef 75 /*Function to make a single or multi write to the device, based off
MitchAD 2:1857aa1363ef 76 the registers size which you can find in the devices data sheet
MitchAD 2:1857aa1363ef 77 Parameters: Pointer to adxxxx's descriptor, register struct to read from
MitchAD 2:1857aa1363ef 78 Return Value: SUCCESS, FAILURE*/
MitchAD 2:1857aa1363ef 79 int adxxx_write(struct adxxxx_descriptor *device, struct adxxxx_reg* reg, uint32_t data) {
MitchAD 2:1857aa1363ef 80 /*Follow your devices specific write protocol (I2C, SPI) in conjunction
MitchAD 2:1857aa1363ef 81 with the platform specific drivers to effectively communicate with your
MitchAD 2:1857aa1363ef 82 device (Try and write to a read-enabled register and then immediately
MitchAD 2:1857aa1363ef 83 read back the value you wrote)*/
MitchAD 2:1857aa1363ef 84 reg->value = data;
MitchAD 2:1857aa1363ef 85 return SUCCESS;
MitchAD 1:9524c69f480d 86 }