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Atmel SAM4 Series User Manual
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AT07334: SAM4 TWI Master Mode Driver [APPLICATION NOTE]
42274A-MCU-05/2014
19
6.
Extra Information
6.1
Acronyms
Term
Definition
SCR
Status Clear Register
NAK
Negative Acknowledgement
DNAK
Negative Acknowledgement int TWI data phase
ANAK
Negative Acknowledgement int TWI address phase
ARBLST
Arbitration lost to a higher priority bus master in TWI
multi-master mode
IER
Interupt Enable Register
18
20
Table of Contents
SAM4 TWI Master Mode Driver
1
Table of Contents
2
Software License
4
1 Prequisites
5
2 Module Overview
6
TWI Bus Topology
6
3 Examples
7
4 API Overview
8
Variable and Type Definitions
8
Type Twim_Transfer_Status_T
8
Type Twim_Callback_T
8
Structure Definitions
8
Struct Twim_Config
8
Struct Twim_Package
9
Macro Definitions
9
TWI Driver Compatibility
9
Macro TWI_FAST_MODE_PLUS_SPEED
10
Macro TWI_FAST_MODE_SPEED
10
Macro TWI_HIGH_SPEED_MODE_SPEED
10
Macro TWI_STD_MODE_SPEED
10
Macro TWIM_IER_NAK_MASK
10
Macro TWIM_IER_STD_MASK
10
Macro TWIM_LOW_POWER_ENABLE
10
Macro TWIM_SCR_NAK_MASK
11
Macro TWIM_SR_NAK_MASK
11
Macro TWIM_SR_STD_MASK
11
Function Definitions
11
Function Twi_Master_Read()
11
Function Twi_Master_Write()
11
Function Twim_Clear_Status()
12
Function Twim_Default_Callback()
12
Function Twim_Disable()
12
Function Twim_Disable_Interrupt()
13
Function Twim_Enable()
13
Function Twim_Enable_Interrupt()
13
Function Twim_Get_Interrupt_Mask()
14
Function Twim_Get_Status()
14
Function Twim_Pdca_Transfer_Prepare()
14
Function Twim_Probe()
15
Function Twim_Set_Callback()
15
Function Twim_Set_Config()
15
Function Twim_Set_Hsmode_Speed()
16
Function Twim_Set_Speed()
16
Enumeration Definitions
17
Enum Twim_Transfer_Status
17
5 Special Considerations
18
6 Extra Information
19
Acronyms
19
7 TWIM Master Example
20
Purpose
20
Requirements
20
Connections for Board: SAM4L Xplained Pro
20
Connections for Board: SAM4L-EK
20
Description
20
Usage
20
8 Quick Start Guide
22
Use Cases
22
TWIM Basic Usage
22
Setup Steps
22
Prerequisites
22
Basic Setup Workflow
22
Usage Steps
23
Twim_Basic_Usage_Code
23
Index
24
Document Revision History
25
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Atmel SAM4 Series Specifications
General
Brand
Atmel
Model
SAM4 Series
Category
Control Unit
Language
English
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