Datasheet
Table Of Contents
- RP2040 Datasheet
- Colophon
- Chapter 1. Introduction
- Chapter 2. System Description
- 2.1. Bus Fabric
- 2.2. Address Map
- 2.3. Processor subsystem
- 2.4. Cortex-M0+
- 2.5. DMA
- 2.6. Memory
- 2.7. Boot Sequence
- 2.8. Bootrom
- 2.9. Power Supplies
- 2.10. Core Supply Regulator
- 2.11. Power Control
- 2.12. Chip-Level Reset
- 2.13. Power-On State Machine
- 2.14. Subsystem Resets
- 2.15. Clocks
- 2.16. Crystal Oscillator (XOSC)
- 2.17. Ring Oscillator (ROSC)
- 2.18. PLL
- 2.19. GPIO
- 2.20. Sysinfo
- 2.21. Syscfg
- 2.22. TBMAN
- Chapter 3. PIO
- Chapter 4. Peripherals
- 4.1. USB
- 4.2. UART
- 4.3. I2C
- 4.3.1. Features
- 4.3.2. IP Configuration
- 4.3.3. I2C Overview
- 4.3.4. I2C Terminology
- 4.3.5. I2C Behaviour
- 4.3.6. I2C Protocols
- 4.3.7. Tx FIFO Management and START, STOP and RESTART Generation
- 4.3.8. Multiple Master Arbitration
- 4.3.9. Clock Synchronization
- 4.3.10. Operation Modes
- 4.3.11. Spike Suppression
- 4.3.12. Fast Mode Plus Operation
- 4.3.13. Bus Clear Feature
- 4.3.14. IC_CLK Frequency Configuration
- 4.3.15. DMA Controller Interface
- 4.3.16. Operation of Interrupt Registers
- 4.3.17. List of Registers
- 4.4. SPI
- 4.5. PWM
- 4.6. Timer
- 4.7. Watchdog
- 4.8. RTC
- 4.9. ADC and Temperature Sensor
- 4.10. SSI
- 4.10.1. Overview
- 4.10.2. Features
- 4.10.3. IP Modifications
- 4.10.4. Clock Ratios
- 4.10.5. Transmit and Receive FIFO Buffers
- 4.10.6. 32-Bit Frame Size Support
- 4.10.7. SSI Interrupts
- 4.10.8. Transfer Modes
- 4.10.9. Operation Modes
- 4.10.10. Partner Connection Interfaces
- 4.10.11. DMA Controller Interface
- 4.10.12. APB Interface
- 4.10.13. List of Registers
- Chapter 5. Electrical and Mechanical
- Appendix A: Register Field Types
- Appendix B: Errata
- Appendix C: Documentation Release History
•
MOV EXEC which executes an instruction from some register Source
•
OUT EXEC which executes data shifted out from the OSR
•
The SMx_INSTR control registers, to which the system can write instructions for immediate execution
Ê1 .program exec_example
Ê2
Ê3 hang:
Ê4 jmp hang
Ê5 execute:
Ê6 out exec, 32
Ê7 jmp execute
Ê8
Ê9 .program instructions_to_push
10
11 out x, 32
12 in x, 32
13 push
Ê1 #include "tb.h" // TODO this is built against existing sw tree, so that we get printf etc
Ê2
Ê3 #include "platform.h"
Ê4 #include "pio_regs.h"
Ê5 #include "system.h"
Ê6 #include "hardware.h"
Ê7
Ê8 #include "exec_example.pio.h"
Ê9
10 int main()
11 {
12 tb_init();
13
14 for (int i = 0; i < count_of(exec_example_program); ++i)
15 mm_pio->instr_mem[i] = exec_example_program[i];
16
17 // Enable autopull, threshold of 32
18 mm_pio->sm[0].shiftctrl = (1u << PIO_SM0_SHIFTCTRL_AUTOPULL_LSB);
19
20 // Start state machine 0 -- will sit in "hang" loop
21 hw_set_bits(&mm_pio->ctrl, 1u << (PIO_CTRL_SM_ENABLE_LSB + 0));
22
23 // Force a jump to program location 1
24 mm_pio->sm[0].instr = 0x0000 | 0x1; // jmp execute
25
26 // Feed a mixture of instructions and data into FIFO
27 mm_pio->txf[0] = instructions_to_push_program[0]; // out x, 32
28 mm_pio->txf[0] = 12345678; // data to be OUTed
29 mm_pio->txf[0] = instructions_to_push_program[1]; // in x, 32
30 mm_pio->txf[0] = instructions_to_push_program[2]; // push
31
32 // The program pushed into TX FIFO will return some data in RX FIFO
33 while (mm_pio->fstat & (1u << PIO_FSTAT_RXEMPTY_LSB))
34 ;
35
36 printf("%d\n", mm_pio->rxf[0]);
37
38 return 0;
39 }
RP2040 Datasheet
3.5. Functional Details 362