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Code for measuring the signal with a specified length and sampling rate, and saving it on a SD card.
savePower.cpp
- Committer:
- msamadani
- Date:
- 2017-10-05
- Revision:
- 2:8c5b6522139f
- Parent:
- 0:c05b00be2229
File content as of revision 2:8c5b6522139f:
#include "mbed.h" #include "sdram.h" #include "savePower.h" static int phy_write(unsigned int PhyReg, unsigned short Data) { unsigned int timeOut; LPC_EMAC->MADR = DP83848C_DEF_ADR | PhyReg; LPC_EMAC->MWTD = Data; for(timeOut = 0; timeOut < MII_WR_TOUT; timeOut++) { /* Wait until operation completed */ if((LPC_EMAC->MIND & MIND_BUSY) == 0) { return 0; } } return -1; } DigitalOut cke(P2_24); Ethernet eth; DigitalOut p1_19(P1_19); DigitalOut p2_18(P2_18); void savePower(void) { /* -------------------------------------------------------> Initialize SDRAM and set CKE 0 to make sure SDRAM is in power-down mode. CKE is also connected to a 1K5 pull down resistor */ // DigitalOut cke(P2_24); sdram_init(); cke = 0; // set low not to draw any current /* -------------------------------------------------------> Initialize Ethernet by instantiating the Ethernet class The Ethernet interface doesn't contain a power-down method so we reimplement phy_write in this app and puts the PHY in power-down here */ // Ethernet eth; phy_write(PHY_REG_BMCR, PHY_BMCR_PWR_DOWN); /*<------------------------------------------------------- must be low to disable U7 (STMPS2171STR) DigitalOut p1_19(P1_19); */ p1_19 = 0; /* p2.18 connected to 1K5 pull-down resistor DigitalOut p2_18(P2_18); */ p2_18 = 0; }