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This version (24 Mar 2019 23:47) was approved by Dragos Bogdan, Andrei Drimbarean, Stephen Nugent.

Table of Contents

ADGS1408/ADGS1409 - No-OS Driver

Supported Devices

Evaluation Boards

Overview

The ADGS1408/ADGS1409 contains an 8:1/dual 4:1 Multiplexers respectively. The SPI interface has robust error detection features such as cyclic redundancy check (CRC) error detection, invalid read/write address detection, and SCLK count error detection.

It is possible to daisy-chain multiple ADGS1408/ADGS1409 devices together. Daisy-chain mode enables the configuration of multiple devices with a minimal amount of digital lines. The ADGS1408/ADGS1409 can also operate in burst mode to decrease the time between SPI commands.

Each switch conducts equally well in both directions when on, and each switch has an input signal range that extends to the supplies.

Product highlights

  1. SPI interface removes the need for parallel conversion, logic traces and reduces GPIO channel count.
  2. Daisy-chain mode removes additional logic traces when multiple devices are used.
  3. CRC error detection, invalid read/write address detection, and SCLK count error detection ensures a robust digital interface.
  4. CRC and Error detection capabilities allows for the use of the ADGS1408/ADGS1409 in safety critical systems.
  5. Minimum distortion.

No-OS Driver Description

Functions Declarations

Function Description 
uint8_t adgs1408_compute_crc8(uint8_t *data, uint8_t data_size)
 Compute CRC8 checksum. 
int32_t adgs1408_spi_reg_read(struct adgs1408_dev *dev, uint8_t reg_addr, uint8_t *reg_data)
 SPI register read from device. 
int32_t adgs1408_spi_reg_write(struct adgs1408_dev *dev, uint8_t reg_addr, uint8_t reg_data)
 SPI register write to device. 
int32_t adgs1408_spi_reg_write_mask(struct adgs1408_dev *dev, uint8_t reg_addr, uint8_t mask, uint8_t data)
 SPI internal register write to device using a mask. 
int32_t adgs1408_do_soft_reset(struct adgs1408_dev *dev)
 Do a software reset. 
int32_t adgs1408_clear_err_flags(struct adgs1408_dev *dev)
 Clear the Error Flags Register. 
int32_t adgs1408_enter_daisy_chain(struct adgs1408_dev *dev)
 Enter Daisy-Chain Mode. 
int32_t adgs1408_send_daisy_chain_cmds(struct adgs1408_dev *dev, uint8_t *cmds, uint8_t cmds_size)
 Send Daisy-Chain commands. 
int32_t adgs1408_enter_round_robin(struct adgs1408_dev *dev)
 Enter Round Robin Mode. 
int32_t adgs1408_configure_round_robin(struct adgs1408_dev *dev, uint8_t cnv_polarity)
 Configure Round Robin Mode. 
int32_t adgs1408_exit_round_robin(struct adgs1408_dev *dev)
 Exit Round Robin Mode. 
int32_t adgs1408_init(struct adgs1408_dev **device, struct adgs1408_init_param init_param)
 Initialize the device. 
int32_t adgs1408_remove(struct adgs1408_dev *dev)
 Free the resources allocated by adgs1408_init().

Types Declarations

enum adgs1408_type {
	ID_ADGS1408,
	ID_ADGS1409,
};
 
enum adgs1408_state {
	ADGS1408_ENABLE,
	ADGS1408_DISABLE,
};
 
struct adgs1408_rrobin_config {
	bool rrobin_sw1;
	bool rrobin_sw2;
	bool rrobin_sw3;
	bool rrobin_sw4;
	bool rrobin_sw5;
	bool rrobin_sw6;
	bool rrobin_sw7;
	bool rrobin_sw8;
};
 
struct adgs1408_dev {
	/* SPI */
	spi_desc	*spi_desc;
	/* Device Settings */
	enum adgs1408_state	crc_en;
	enum adgs1408_state	burst_mode_en;
	enum adgs1408_state	daisy_chain_en;
	enum adgs1408_state	round_robin_en;
	struct adgs1408_rrobin_config rrobin_sw_config;
	enum adgs1408_type act_device;
};
 
struct adgs1408_init_param {
	/* SPI */
	spi_init_param	spi_init;
	/* Device Settings */
	enum adgs1408_state	crc_en;
	enum adgs1408_state	burst_mode_en;
	enum adgs1408_state	daisy_chain_en;
	enum adgs1408_state	round_robin_en;
	struct adgs1408_rrobin_config rrobin_sw_config;
	enum adgs1408_type act_device;
};

No-OS Downloads

15 May 2018 12:57
resources/tools-software/uc-drivers/adgs1408.txt · Last modified: 24 Mar 2019 23:47 by Dragos Bogdan

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